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Probationary lecturer in Ruhunu University- 
Theoretical research on magnetic thin films
I was rewarded by presidential awards in 2001, 2002,
2003, 2006, 2007 and 2009 for my research articles published in these years
Marquis Who’s Who in Asia-2007International conference on multidisciplinary research (ICMR)
M.S.M. Farhan and P. Samarasekara (2024). Determination of bcc structured ferromagnetic thin films with two spin layers using the fourth order perturbed Heisenberg Hamiltonian. International conference on multidisciplinary research (ICMR), 2024: 18.
Ceylon Journal of Science
R.A.S.R. Ranasinghe, K.A.C. Rathnathilaka, P.G.D.C.K.
Karunarathna and P. Samarasekara (2024). Carbon gas sensors
synthesized using acacia
auriculiformis tree branches to detect methanol, ethanol,
acetone vapors and ammonia gas. Ceylon Journal of Science, 53(2): 207-218.
DOI: https://doi.org/10.4038/cjs.v53i2.8412
Ionic Research and Engineering Journals
Chathuranga Rathnayake, L.K. Narangammana, Roshan Thotagamuge,
P.G.D.C.K. Karunarathna and P. Samarasekara (2024). Synthesis and
Characterization of Low-Cost, N-Type Flexible Hybrid Organic/Inorganic
Composite Sheets of PVDF Incorporating
Ni and Cu Nanoparticles for Enhanced
Electrical Conductivity and Thermoelectric Properties at Room
Temperature. Ionic Research and Engineering Journals, 7(11): 404-419.
https://www.irejournals.com/paper-details/1705829
STM Journals: International Journal of Membranes
C.A. Samarahewa,
Sunil Dehipawala and P. Samarasekara (2024). Optimization of gas sensitivity of CuO/carbon composites
with carbon particles synthesized from acacia auriculiformis branches. STM Journals: International Journal of Membranes, 1(1): 1.
https://journals.stmjournals.com/ijm/article=2024/view=147166/
GESJ: Physics
M.S.M. Farhan, M.A.A.Karunarathna and P. Samarasekara (2024). EXPLORING MAGNETIC ANISOTROPY IN BCC-STRUCTURED FERROMAGNETIC THIN FILMS WITH THREE SPIN LAYERS USING THE FOURTH ORDER PERTURBED HEISENBERG HAMILTONIAN. GESJ: Physics, 1(30): 6-19.
2nd International conference on Frontiers in chemical technology (FCT2)
M.S.M. Frahan and P. Samarasekara (2024). Analysis of demagnetization energy in ferromagnetic thin films using the fourth order perturbed Heisenberg Hamiltonian with all seven magnetic energy parameters. 2nd International conference on Frontiers in chemical technology (FCT2), 2: 26.
Heliyon
Yashas Balasooriya, Pubudu Samarasekara, Chee
Ming Lim, Yuan-Fong Chou Chau, Muhammad Raziq Rahimi Kooh and Roshan Thotagamuge (2023). Cu-Nitrogen doped graphene (Cu-N/Gr)
nanocomposites as cathode catalyst in fuel cells – DFT study. Heliyon, 9: e15989.
DOI: https://doi.org/10.1016/j.heliyon.2023.e15989
STM Journals: Research & Reviews: Journal of Space Science & Technology
Arunan Sinnappoo, N.U.S. Yapa and P.
Samarasekara (2023). Radial
oscillation modes of delta scuti stars KIC 2439660, KIC
3219256 and KIC 6965789 investigated using Kepler
asteroseismic science data. STM Journals: Research & Reviews: Journal of Space Science & Technology, 12(1): 9-20.
http://sciencejournals.stmjournals.in/index.php/RRJoSST/index
Ceylon Journal of Science
M.S.M. Farhan, M.A.A. Karunarathna and P. Samarasekara (2023). “Investigation of Magnetic Properties of Ferromagnetic Thin Films with Three Spin Layers Using The Fourth Order Perturbed Heisenberg Hamiltonian”. Ceylon Journal of Science, 52(2).
DOI: https://doi.org/10.4038/cjs.v52i2.8155
GESJ:Physics
M.S.M. Farhan, P. Samarasekara and M.K. Abeyratne (2023). FCC
structured ferromagnetic ultra-thin films with
two spin layers described by fourth order perturbed Heisenberg Hamiltonian with all seven parameters. GESJ:Physics, 1(28): 17-25.
http://gesj.internet-academy.org.ge/download.php?id=3614.pdf&t=1
GESJ:Physics
J.V.S.S.D. Perera, P.G.D.C.K. Karunarathna and
P. Samarasekara (2023). Band gap studies of nanocomposites
of ZnO/SnO2 with different molar ratios. GESJ:Physics, 1(28): 26-33.
http://gesj.internet-academy.org.ge/download.php?id=3617.pdf&t=1
GESJ:Physics
R.A.S.R. Ranasinghe,
P.G.D.C.K. Karunarathna and P. Samarasekara (2023). ZnO layers synthesized using doctor blade method
to detect ethanol, methanol and acetone vapors and CO2
gas. GESJ:Physics, 1(28): 47-55.
http://gesj.internet-academy.org.ge/download.php?id=3642.pdf&t=1
7th International research conference of Uva Wellassa University, IRCUW
M.S.M. Farhan and P. Samarasekara (2023). Magnetic energy of face-centered cubic structured ferromagnetic ultra-thin films with three spin layers as described by fourth-order perturbed Heisenberg Hamiltonian. 7th International research conference of Uva Wellassa University, IRCUW, 7: 243.
International conference of Applied and Pure sciences
M.S.M. Farhan and P. Samarasekara (2023). Simple cubic structured ferromagnetic thin films with two spin layers explained by fourth order perturbed Heisenberg Hamiltonian. International conference of Applied and Pure sciences, 3: 65.
Molecules
Yashas Balasooriya, Pubudu Samarasekara, Chee Ming Lim,
Yuan-Fong Chou Chau,
Muhammad Raziq Rahimi Kooh and Roshan Thotagamuge (2023). Density
Functional
theory investigation of temperature-dependent properties of Cu-Nitrogen-doped
graphene as a material in fuel cell applications. Molecules, 28: 7873.
https://www.mdpi.com/1420-3049/28/23/7873
GESJ:Physics
C.A. Samarahewa,
P.G.D.C.K. Karunarathna and P. Samarasekara (2023). Controllable
gas sensitivity of Mg/CuO nanocomposite films
measured in methanol vapor. GESJ:Physics, 2(29): 24-35.
https://gesj.internet-academy.org.ge/download.php?id=3707.pdf&t=1
STM Journals: Journal of Material and Metallurgical Engineering
W.M.J.M.
Madhuhansi, E.N. Jayaweera, P.G.D.C.K. Karunarathna and
P.
Samarasekara (2023). Enhancement of
electrical conductivity of laterite derived ferric oxide to facilitate as anode materials. STM Journals: Journal of Material and Metallurgical Engineering, 13(3): 1-11.
https://engineeringjournals.stmjournals.in/index.php/JoMME/article/view/7836
Ionic Research and Engineering Journals
H.M.K.L. Hathurusingha, P.G.D.C.K. Karunarathna
and P. Samarasekara (2022). Development of hole conductivity of CuSCN by
adding Mn. Ionic Research and Engineering Journals, 5(10): 6-12.
https://irejournals.com/paper-details/1703320
STM journals: Journal of Nanoscience, NanoEngineering & Applications
M.S.M. Farhan and P. Samarasekara (2022). A solution of fourth order perturbed Heisenberg Hamiltonian with seven magnetic parameters. STM journals: Journal of Nanoscience, NanoEngineering & Applications, 12(1): 1-13.
GESJ: Physics
M.S.M. Farhan and P. Samarasekara (2022). Fourth Order Perturbed Heisenberg Hamiltonian with Seven Magnetic Parameters of bcc Structured Ferromagnetic Ultrathin Films. GESJ: Physics, 1(26): 29-45.
STM journals: Journal of Nanoscience, Nanoengineering & Applications
J.V.S.S.D. Perera, P.G.D.C.K. Karunarathna and P. Samarasekara (2022). Investigation of Photocatalytic Properties of Microwave Hydrothermal Synthesized ZnO, SnO2 and ZnO/SnO2 Nanocomposites. STM journals: Journal of Nanoscience, Nanoengineering & Applications, 12(2): 36-46.
Proceedings of the postgraduate institute of science research congress
M.S.M. Farhan and P. Samarasekara (2022). Ferromagnetic thin films with fcc structure as described by fourth order perturbed Heisenberg Hamiltonian with seven magnetic parameters. Proceedings of the postgraduate institute of science research congress, 9: 164.
Proceedings of the 11th Annual Science Research Sessions, FAS, SEUSL, Sri Lanka
M.S.M. Farhan and P. Samarasekara (2022). Fourth order perturbed Heisenberg Hamiltonian of bcc structured ferromagnetic thin films with three spin layers. Proceedings of the 11th Annual Science Research Sessions, FAS, SEUSL, Sri Lanka, 11: 49.
STM journals: Journal of Nanoscience, NanoEngineering & Applications
N.U.S. Yapa, E.M.P.
Ekanayake and P. Samarasekara (2021). Spin reorientation of CoPt/AlN films and Gd films described
by third order perturbed Heisenberg Hamiltonian. STM journals: Journal of Nanoscience, NanoEngineering & Applications, 11(1): 37-45.
DOI: https:// doi.org/10.37591/jonsnea.v11i1.1085
Ionic research and engineering journals
R.M.T.D.Rajapaksha, P. Samarasekara, P.
G. D. C. K. Karunarathna, T.M.W.J. Bandara and C. A.
N. Fernando (2021). Enhancement of gas
sensitivity of ferric oxide thin films by adding activated carbon nanoparticles. Ionic research and engineering journals, 4(10): 107-113.
DOI: https://doi.org/10.13140/RG.2.2.10233.70244
Bulletin of materials science
R.M.T.D.Rajapaksha,
P. Samarasekara, P. G. D. C. K. Karunarathna,
and C. A. N. Fernando (2021). Improvement of gas
sensitivity of ferric oxide thin films by adding Mn nanoparticles. Bulletin of materials science, 44: Article number 182.
DOI: https://doi.org/10.1007/s12034-021-02473-8
GESJ: Physics
P. Samarasekara and E.M.P. Ekanayake (2021). Fourth order
perturbed Heisenberg Hamiltonian of fcc structured ferromagnetic
ultra-thin films. GESJ: Physics, 1(25): 19-29.
DOI: https://doi.org/10.13140/RG.2.2.11225.65121
Journal of Science of the University of Kelaniya Sri Lanka
P. Samarasekara and M.K. Abeyratne (2021). Magnetic properties of ferromagnetic thin films with three spin layers as described
by fourth-order perturbed Heisenberg
Hamiltonian. Journal of Science of the University of Kelaniya Sri Lanka, 14: 31-50.
DOI: http://doi.org/10.4038/josuk.v14i0.8033
International Journal of Advanced Scientific Research and Management (IJASRM)
M.A.A. Karunarathna, C.A.N. Fernando and P. Samarasekara (2020). Human Exposure Levels Due to Mobile Base Station Antennas in Sri Lanka. International Journal of Advanced Scientific Research and Management (IJASRM), 5(1): 26-31.
Journal of Science of the University of Kelaniya Sri Lanka
P. Samarasekara (2020). Fe3O4 thick films as described by second order perturbed Heisenberg Hamiltonian. Journal of Science of the University of Kelaniya Sri Lanka, 13: 1-17.
DOI: https://doi.org/10.4038/josuk.v13i0.8010
GESJ: Physics
D. M. C. U. Dissanayake and P. Samarasekara (2020). Annealing time
dependence of structural and optical
properties of spin coated CdS films. GESJ: Physics, 1(23): 10-19.
DOI: https://doi.org/10.13140/RG.2.2.21230.77121
GESJ: Physics
P. Samarasekara (2020). Third order perturbed Heisenberg Hamiltonian of Fe3O4 ultra thin Films. GESJ: Physics, 1(23): 20-28.
DOI: https://doi.org/10.13140/RG.2.2.27941.65769
GESJ:Physics
P. Samarasekara, P.
G. D. C. K. Karunarathna, B. M. C. M. Bandaranayake and
C. A. N. Fernando (2020). Enhancing the
photocurrent of spin coated CuO thin films using TX 100 surfactant. GESJ:Physics, 2(24): 3-14.
DOI: https://doi.org/10.13140/RG.2.2.29705.47200
STM journals: Journal of Nanoscience, NanoEngineering & Applications
P. Samarasekara and E.M.P. Ekanayake (2020). Ferromagnetic thin
films with simple cubic structure as described by
fourth order perturbed Heisenberg Hamiltonian. STM journals: Journal of Nanoscience, NanoEngineering & Applications, 10(3): 35-43.
DOI: https://doi.org/10.37591/jonsnea.v10i3.1048
International Journal of advanced research in science, engineering and Technology (IJARSET)
M.A.A. Karunarathna, C.A.N. Fernando and P. Samarasekara (2019). RF radiation distribution & corresponding exposure levels due to mobile base stations in Sri Lanka. International Journal of advanced research in science, engineering and Technology (IJARSET), 6(1): 7909-7916.
8th YSF symposium
H.T.D.S. Madusanka, G.G. Chathuranga, W.A.D.P.B. Senarathne, P. Samarasekara, U.S. Liyanaarachchi and C.A.N. Fernando (2019). Gas sensing properties of Hematite (Fe2O3) nanostructure bindered with PTFE. 8th YSF symposium, 8.
International Journal of advanced research in science, engineering and Technology (IJARSET)
M.A.A. Karunarathna, C.A.N. Fernando, P. Samarasekara and T. Arudchelvam (2019). Specific Absorption Rate (SAR) Distribution by the Human Eye Due to Mobile Base Station Antennas in Sri Lanka. International Journal of advanced research in science, engineering and Technology (IJARSET), 6(5): 9383-9391.
International Journal of research and engineering (IJRE)
M.A.A. Karunarathna,
C.A.N. Fernando and P. Samarasekara (2019). Effect of shape, size and electrical properties on specific
absorption rate (SAR). International Journal of research and engineering (IJRE), 6(3): 607-611.
DOI: https://dx.doi.org/10.21276/ijre.2019.6.3.1
GESJ: Physics
D. M. C. U. Dissanayake, J.S.T. Wickramasinghe and P. Samarasekara (2019). Effect of annealing temperature on photovoltaic properties of spin coated CdS films. GESJ: Physics, 1(21): 18-26.
GESJ: Physics
P. Samarasekara, M.S.P.K. Gunasinghe, P.G.D.C.K. Karunarathna, H.T.D.S. Madusanka and C.A.N. Fernando (2019). Effect of PEG binder on gas sensitivity of ferric oxide films synthesized by spin coating and doctor blade methods. GESJ: Physics, 1(21): 7-17.
Ceylon journal of science
P. Samarasekara and S. Dehipawala (2019). The magnetic properties of Fe3O4 thick films as described by third order perturbed Heisenberg
Hamiltonian. Ceylon journal of science, 48(3): 217-223.
DOI: https://doi.org/10.4038/cjs.v48i3.7645
GESJ: Physics
P. Samarasekara, M.S.P.K. Gunasinghe, P.G.D.C.K. Karunarathna, H.T.D.S. Madusanka and C.A.N. Fernando (2019). Temperature dependence of gas sensitivity of ferric oxide thin films in CO2 gas, acetone, ethanol and methanol vapors. GESJ: Physics, 2(22): 3-11.
International journal of advanced scientific research in science, engineering and technology (IJARSET)
M.A.A. Karunarathna, C.A.N. Fernando and P. Samarasekara (2018). Experimental observations & comparison on RF emissions due to mobile base station antennas in Sri Lanka. International journal of advanced scientific research in science, engineering and technology (IJARSET), 5(4): 5526-5533.
Materials Research Express
P. Samarasekara, P. G. D. C. K. Karunarathna, H. P. Weeramuni and C. A. N. Fernando (2018). Electrical
properties of spin coated Zn doped CuO films. Materials Research Express, 5(6): 066418.
DOI: https://doi.org/10.1088/2053-1591/aacc7e
GESJ: Physics
P. Samarasekara, P.G.D.C.K. Karunarathna, H.P. Weeramuni and C.A.N. Fernando (2018). Characterization of spin coated Zn doped cupric oxide thin films. GESJ: Physics, 1(18): 13-20.
GESJ: Physics
P. Samarasekara, N.U.S. Yapa and C.A.N. Fernando (2018). Third order perturbed modified Heisenberg Hamiltonian of fcc structured ferromagnetic films with seventy spin layers. GESJ: Physics, 1(18): 3-12.
Materials Research Express
H T D S
Madusanka, P Samarasekara and C A N Fernando (2018). Polytetrafluoroethylene bindered Hematite (α – Fe2O3) Nanostructure for Ammonia Gas Detection at Room Temperature. Materials Research Express, 5: 125002.
DOI: https://doi.org/10.1088/2053-1591/aadfc7
Nanostructured thin films
Sunil Dehipawala, Pubudu Samarasekara, Khushpreet Kaur and Harsha Rajapakse (2018). Comparison of structural properties of iron nano-particles prepared by sol-gel method and spin coating technique. Nanostructured thin films, XI.
DOI: https://doi.org/10.1117/12.2320410
Ceylon Journal of Science
P. Samarasekara (2018). Second order
perturbed Heisenberg Hamiltonian of Fe3O4 ultra-thin films. Ceylon Journal of Science, 47(3): 221-227.
DOI: https://doi.org/10.4038/cjs.v47i3.7529
Winc 2018
M.A.A. Karunarathna, C.A.N. Fernando and P. Samarasekara (2018). Electromagnetic Radiation Measurements and Safety Issues Due to Mobile Base Station Antennas in Sri Lanka. Winc 2018, .
Materials Research Express
P Samarasekara, P G D C K Karunarathna, B M C M Bandaranayake, J S T Wickramasinghe and C A N Fernando (2018). Spin coated
multilayered CuO/ZnO films with high output power under irradiation. Materials Research Express, 6(3): 036415.
DOI: https://doi.org/10.1088/2053-1591/aaf7a5
American Chemical Society
K. Kaur, S. Dehipawala and P. Samarasekara (2018). Chemical environment of iron and nickel atoms in thin film magnets. American Chemical Society, 256.
GESJ: Physics
D. M. C. U. Dissanayake and P. Samarasekara (2018). Effect of number of layers on structural and optical properties of spin coated CdS films. GESJ: Physics, 2(20): 11-17.
Ceylon Journal of Science
P. Samarasekara and T.H.Y.I.K. De Silva, (2017). “Fcc and bcc structured ferromagnetic films with five to twenty spin layers explained by second order perturbed Heisenberg Hamiltonian”. Ceylon Journal of Science, 46(1): 37-45.
International journal of advanced scientific research and management (IJASRM)
M.A.A. Karunarathna, C.A.N. Fernando and P. Samarasekara (2017). Assessment of RF exposure levels occur due to mobile base station antennas in Sri Lanka. International journal of advanced scientific research and management (IJASRM), 2(12): 11-17.
GESJ: Physics
N.U.S. Yapa and P. Samarasekara (2017). Third order perturbed Heisenberg Hamiltonian of sc ferromagnetic films with fifty spin layers. GESJ: Physics, 2(18): 64-72.
GESJ: Physics
P. Samarasekara and T.H.Y.I.K. De Silva (2017). Ferromagnetic films with three to twenty spin layers as described using second order perturbed Heisenberg Hamiltonian. GESJ: Physics, 1(17): 3-12.
Ceylon Journal of Science
N.U.S. Yapa, P. Samarasekara and Sunil Dehipawala (2017). Variation of magnetic easy direction of bcc structured ferromagnetic films up to thirty spin layers. Ceylon Journal of Science, 46(3): 93-103.
GESJ: Physics
P. Samarasekara, B.M.M.B. Basnayaka and Sunil Dehipawala (2017). Photocurrent enhancement of spin coated CdS thin films by adding Cu. GESJ: Physics, 2(18): 39-46.
Journal of science: University of Kelaniya
P. Samarasekara and B. I. Warnakulasooriya (2016). “Five layered fcc ferromagnetic films as described by modified second order perturbed Heisenberg Hamiltonian”. Journal of science: University of Kelaniya, 11: 11-21.
GESJ: Physics
P. Samarasekara and N.U.S. Yapa, (2016). “Simple cubic ferromagnetic films with three layers as described by third order perturbed Hamiltonian”. GESJ: Physics, 2(16): 3-11.
Ceylon Journal of Science
P. Samarasekara and N.U.S. Yapa, (2016). “Third order perturbed energy of fcc ferromagnetic thin films as described by Heisenberg Hamiltonian”. Ceylon Journal of Science, 45(2): 71-77.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara and N.U.S. Yapa, (2016). “Third order perturbed Heisenberg Hamiltonian of bcc ferromagnetic ultra thin films”. Research & Reviews: Journal of Physics-STM journals, 5(2): 23-30.
GESJ: Physics
P. Samarasekara and P.A.S. Madushan, (2016). “Synthesis of multilayered CdS thin films on amorphous glass substrates by spin coating”. GESJ: Physics, 1(15): 20-26.
GESJ: Physics
P. Samarasekara and P.A.S. Madushan, (2016). “Electrical properties of CdS thin films spin coated on conductive glass substrates”. GESJ: Physics, 2(16): 12-18.
GESJ: Physics
P. Samarasekara and N.G.K.V.M. Premasiri, (2016). "Optical properties of spin coated and sol-gel dip coated cupric oxide thin films”. GESJ: Physics, 1(15): 27-33.
American Physical Society (APS) March meetings
Sunil Dehipawala, Pubudu Samarasekara, Rasika Dahanayake and Leung Edmund (2016). Micro-structure of iron in Petroselinum crispum and its dependence with the chemical nature of the soil. American Physical Society (APS) March meetings, .
Journal of science: University of Kelaniya
D.M.C.U. Dissanayake and P. Samarasekara, (2015). “Optical and structural Properties of Spin Coated Cadmium Sulphide Thin Films”. Journal of science: University of Kelaniya, 10: 13-20.
Physical chemistry of interfaces and nanomaterials XIV, Proceedings of SPIE Photonics west
Sunil Dehipawalage, Pubudu Samarasekara, Rasika Dahanayake, George Tremberger Jr., Tak D. Cheung and Harry D. Gafney, (2015). “Characterization of nano-sized iron particle layers spin coated on glass substrate”. Physical chemistry of interfaces and nanomaterials XIV, Proceedings of SPIE Photonics west, 9549: 95490X-1-5.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara and N.G.K.V.M. Premasiri, (2015). "Structural properties of spin coated multilayered cupric oxide thin films”. Research & Reviews: Journal of Physics-STM journals, 4(2): 8-13.
Advanced materials research
Sunil Dehipawala, Pubudu Samarasekara and Rasika Dahanayake (2015). “Structural Study of Iron Oxide Thin Films Using Pre-edge Feature of XANES”. Advanced materials research, 1098: 58-62.
GESJ: Physics
P. Samarasekara, Udumbara Wijesinghe and E.N. Jayaweera, (2015). “Impedance and electrical properties of Cu doped ZnO thin films”. GESJ: Physics, 1(13): 3-9.
GESJ: Physics
P. Samarasekara and Udumbara Wijesinghe, (2015). “Optical properties of spin coated Cu doped ZnO nanocomposite films”. GESJ: Physics, 2(14): 41-50.
Nanoscience, Multidisciplinary conference, NewYork
Sunil Dehipawala, Rahel Steffen, Pubudu Samarasekara, Rasika Dahanayaka (2015). Characterization of Iron Nano Particles using Synchrotron X-rays. Nanoscience, Multidisciplinary conference, NewYork, 1.
Peradeniya University Research Sessions (iPURSE)
D.M.C.U. Dissanayake and P. Samarasekara (2015). Characterization of sol-gel spin coated nanocrystalline cadmium sulphide thin films. Peradeniya University Research Sessions (iPURSE), 19: 327.
GESJ: Physics
P. Samarasekara, Rasika Dahanayake and S. Dehipawalage (2014). “Spin Coated Fe and Ni Mixed Oxide (FexNiyOz) Films and Their Structural Properties”. GESJ: Physics , 2(12): 3-7.
GESJ: Physics
P. Samarasekara and C. K.D. Sirimanna, (2014). “Magnetic dipole interaction and total magnetic energy of Lithium ferrite thin films”. GESJ: Physics, 1(11): 3-12.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara, (2014). “Field Dependence of Third Order Perturbed Energy of Cobalt Ferrite Thick Films”. Research & Reviews: Journal of Physics-STM journals, 3(1): 1-7.
Journal of science: University of Kelaniya
P. Samarasekara, (2014). “Cobalt ferrite films as described by third order perturbed Heisenberg Hamiltonian”. Journal of science: University of Kelaniya, 9: 27-38.
American Physical Society (APS) March meetings
Amber LaGuerre, P. Samarasekara, Rasika Dahanayake and Sunil Dehipawala (2014). The structural study of Spin Coated Thin Film Magnets. American Physical Society (APS) March meetings, 59(1).
Peradeniya University Research Sessions (iPURSE)
P. Rajakaruna and P. Samarasekara (2014). An Explanation to Spin Reorientation of CoPt/AlN multilayers using Heisenberg Hamiltonian with Third-order Perturbation. Peradeniya University Research Sessions (iPURSE), 18: 407.
Peradeniya University Research Sessions (iPURSE)
C.K.D. Sirimanna and P. Samarasekara (2014). Determination of magnetic energy of Lithium ferrite using Heisenberg Hamiltonian. Peradeniya University Research Sessions (iPURSE), 18: 435.
American Physical Society (APS) March meetings
Katherine Vides, Rasika Dahanayake, Pubudu Samarasekara and Sunil Dehipawala (2014). Micro Structure of Nickel in spin coated thin film magnets. American Physical Society (APS) March meetings, 59(1).
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara and Prabhani Rajakaruna, (2013). “Orientation of easy axis of ferromagnetic films as explained by third order perturbed Heisenberg Hamiltonian”. Research & Reviews: Journal of Physics-STM journals, 2(3): 5-9.
GESJ: Physics
P. Samarasekara, (2013). “Inverse Spinel cobalt ferrite ultra-thin films as explained by second order perturbed Heisenberg Hamiltonian”. GESJ: Physics, 2(10): 10-17.
GESJ: Physics
P. Samarasekara, Rasika Dahanayake and S. Dehipawalage, (2013). “Characterization of spin coated Iron oxide films using EXAFS”. GESJ: Physics, 2(10): 36-41.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara and Udara Saparamadu (2013). "In plane oriented Strontium ferrite thin films described by spin reorientation". Research & Reviews: Journal of Physics-STM journals, 2(2): 12-16.
GESJ: Physics
P. Samarasekara and Udara Saparamadu (2013). “Easy axis orientation of Barium hexa-ferrite films as explained by spin reorientation”. GESJ: Physics, 1(9): 10-15.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara and Amila D. Ariyaratne, (2012). “Determination of magnetic properties of Cobalt films using second order perturbed Heisenberg Hamiltonian”. Research & Reviews: Journal of Physics-STM journals, 1(1): 16-23.
GESJ: Physics
P. Samarasekara and Udara Saparamadu, (2012). “Investigation of Spin Reorientation in Nickel Ferrite Films”. GESJ: Physics, 1(7): 15-20,.
GESJ: Physics
P. Samarasekara (2012). “Photocurrent Variation of Dye Coated Titanium Dioxide Liquid Junction Photocells”. GESJ: Physics, 2(8): 3-9.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara, (2012). “Relationship between demagnetization factor and energy of thick ferromagnetic films”. Research & Reviews: Journal of Physics-STM journals, 1(3): 1-6.
Research & Reviews: Journal of Physics-STM journals
P. Samarasekara, (2012). “Demagnetization factor dependence of energy of ultra-thin ferromagnetic films with four layers”. Research & Reviews: Journal of Physics-STM journals, 1(2): 1-8.
Peradeniya University Research Sessions (PURSE)
K.P.T Silva and P. Samarasekara (2012). The study and comparison of the Generalized Chaplygin gas Model and the unification of dark energy and dark matter. Peradeniya University Research Sessions (PURSE), 17: 203.
GESJ: Physics
P. Samarasekara and N.H.P.M. Gunawardhane, (2011). “Explanation of easy axis orientation of ferromagnetic films using Heisenberg Hamiltonian”. GESJ: Physics, 2(6): 62-69.
Journal of Science, University of Kelaniya
P. Samarasekara, (2011). “Stress induced anisotropy and applied field dependence of second order perturbed energy of thick ferromagnetic films”. Journal of Science, University of Kelaniya, 6: 77-84.
GESJ: Physics
P. Samarasekara, (2011). “Variation of energy with anisotropy constants of ferromagnetic thin films with four layers”. GESJ: Physics, 2(6): 48-56.
Inventi Rapid: modeling & simulation
P. Samarasekara, (2011). “Contribution of stress induced anisotropy and applied magnetic field to the Heisenberg Hamiltonian of ultra-thin ferromagnetic films with second order perturbation”. Inventi Rapid: modeling & simulation, 1: 1-3.
Inventi Rapid: Algorithm Journal
P. Samarasekara, (2011). “Investigation of Third Order Perturbed Heisenberg Hamiltonian of Thick Spinel Ferrite Films”. Inventi Rapid: Algorithm Journal, 2: 1-3.
GESJ: Physics
P. Samarasekara and William A. Mendoza (2011). “Third Order Perturbed Heisenberg Hamiltonian of Spinel Ferrite Ultra-thin films”. GESJ: Physics, 1(5): 15-24.
GESJ: Physics
P. Samarasekara (2010). “Characterization of Low Cost p-Cu2O/n-CuO Junction”. GESJ: Physics, 2(4): 3-8.
Journal of science; University of Kelaniya
P. Samarasekara (2010). “Liquid Junction Photocells Synthesized with Dye Coated Zinc Oxide Films”. Journal of science; University of Kelaniya, 5: 25-31.
GESJ: Physics
P. Samarasekara (2010). “Determination of Energy of thick spinel ferrite films using Heisenberg Hamiltonian with second order perturbation”. GESJ: Physics, 1(3): 46-52.
Elec. J Theo. Phys.
P. Samarasekara and William A. Mendoza, (2010). “Effect of third order perturbation on Heisenberg Hamiltonian for non-oriented ultra-thin ferromagnetic films”. Elec. J Theo. Phys., 7(24): 197-210.
Peradeniya University Research Sessions( PURSE)
K. S. M. Kumara and P. Samarasekara (2010). Calculation and modeling the dark energy of the universe by the unification of dark energy and dark matter. Peradeniya University Research Sessions( PURSE), 15(1): 443-445.
Chinese J. Phys.
P. Samarasekara (2009). “Hydrogen and Methane Gas Sensors Synthesis of Multi-Walled Carbon Nanotubes”. Chinese J. Phys., 47(3): 361-369.
Physica Status Solidi (a)
Ahalapitiya H. Jayatissa, P. Samarasekara and Guo Kun (2009). “Methane gas sensor application of cuprous oxide synthesized by thermal oxidation”. Physica Status Solidi (a), 206 (2): 332-337.
GESJ: Physics
P. Samarasekara (2009). “Gas sensing properties of tungsten oxide thin films in methane and nitric oxide gases”. GESJ: Physics, 2(2): 44-50.
Ceylon journal of Science
P. Samarasekara, (2009). “Thick ferromagnetic films and anisotropies explained by second order perturbed Heisenberg Hamiltonian”. Ceylon journal of Science, 15: 65-69.
Elec. J. Theo. Phys.
P. Samarasekara, M.K. Abeyratne and S. Dehipawalage (2009). “Heisenberg Hamiltonian with Second Order Perturbation for Spinel Ferrite Thin Films”. Elec. J. Theo. Phys., 6(20): 345-356.
Ceylon J. Science
P. Samarasekara, (2008). “Four layered ferromagnetic ultra-thin films explained by second order perturbed Heisenberg Hamiltonian”. Ceylon J. Science, 14: 11-19.
Journal of Science; University of Kelaniya
P. Samarasekara, (2008). “Applied magnetic field and stress induced anisotropy dependence of energy for oriented ferromagnetic thick films”. Journal of Science; University of Kelaniya, 4: 1-10.
Elec. J. Theo. Phys.
P. Samarasekara, (2008). “Influence of third order perturbation on Heisenberg Hamiltonian of thick ferromagnetic films”. Elec. J. Theo. Phys., 5(17): 227-236.
Ruhuna Journal of Science
P. Samarasekara, (2007). “Effect of demagnetization factor on total energy of ultra-thin ferromagnetic films with three layers”. Ruhuna Journal of Science, 2: 1-9.
Journal of Science; University of Kelaniya
P. Samarasekara, (2007). “Investigation of anisotropy constants dependence of ultra-thin ferromagnetic films with second order perturbed Heisenberg Hamiltonian”. Journal of Science; University of Kelaniya, 3: 73-82.
Ceylon J. Science
P. Samarasekara, (2007). “Second and fourth order anisotropy dependence of the energy of oriented thick ferromagnetic films”. Ceylon J. Science, 13: 17-23.
Elec. J. Theo. Phys.
P. Samarasekara (2007). “Classical Heisenberg Hamiltonian Solution of Oriented Spinel Ferrimagnetic Thin Films”. Elec. J. Theo. Phys., 4(15): 187-200.
Sri Lankan Journal of Physics
P. Samarasekara and N.U.S. Yapa (2007). “Effect of sputtering conditions on the gas sensitivity of Copper Oxide thin films”. Sri Lankan Journal of Physics, 8: 21-27.
Bull. Mater. Sci.
P. Samarasekara, N.U.S. Yapa, N.T.R.N. Kumara and M.V.K. Perera (2007). “CO2 Gas Sensitivity of Sputtered Zinc Oxide Thin Films”. Bull. Mater. Sci., 30(2): 113-116.
Chinese J. Phys.
P. Samarasekara and S.N.P. De Silva (2007). “Heisenberg Hamiltonian solution of thick ferromagnetic films with second order perturbation”. Chinese J. Phys., 45(2-I): 142-150.
J. Phys. Condens. Matter
P. Samarasekara, N.T.R.N. Kumara and N.U.S. Yapa, (2006). “Sputtered Copper Oxide (CuO) thin films for Gas Sensor Devices”. J. Phys. Condens. Matter, 18: 2417-2420.
Elec. J. Theo. Phys.
P. Samarasekara, (2006). “Second order perturbation of Heisenberg Hamiltonian for non-oriented ultra-thin ferromagnetic films”. Elec. J. Theo. Phys., 3(11): 71-83.
Chinese J. Phys.
P. Samarasekara, (2006). “A solution of the Heisenberg Hamiltonian for oriented thick ferromagnetic films”. Chinese J. Phys., 44(5): 377-386.
Ruhuna Journal of Science
P. Samarasekara (2006). Variation of magnetic energy in oriented ultra-thin ferromagnetic Films. Ruhuna Journal of Science, 1: 27-35.
Bull. Mater. Sci.
P. Samarasekara, M.A.K. Mallika Arachchi, A.S. Abeydeera, C.A.N. Fernando, A.S. Disanayake and R.M.G. Rajapakse, (2005). “Photocurrent enhancement of D.C. Sputtered copper oxide thin films”. Bull. Mater. Sci., 28(5): 483-486.
Journal of Science; University of Kelaniya
P. Samarasekara, (2005). “Oxygen partial pressure dependence of the coercivity of Sputtered polycrystalline Nickel ferrite films”. Journal of Science; University of Kelaniya, 2: 73-84.
University of Ruhuna, Science Symposium 3 Proceedings
P. Samarasekara, N.U.S. Yapa and N.T.R.N. Kumara (2005). Photo-voltaic and absorption properties of sputtered zinc oxide thin films. University of Ruhuna, Science Symposium 3 Proceedings, 3: 53-57.
Chinese J. Phys.
P. Samarasekara, (2003). “ A Pulsed RF Sputtering Method for Obtaining Higher Deposition Rates”. Chinese J. Phys., 41(1): 70-74.
Silver Jubilee celebration proceeding
P. Samarasekara (2003). Oxygen Partial Pressure Dependence of the Structure of RF Sputtered Strontium Ferrite. Silver Jubilee celebration proceeding, 1: 138-140.
Chinese J. Phys.
P. Samarasekara, A.G.K. Nisantha and A.S. Disanayake, (2002). “High Photo-Voltage Zinc Oxide Thin Films Deposited by DC Sputtering”. Chinese J. Phys., 40(2): 196-199.
Chinese J. Phys.
P. Samarasekara, (2002). “Easy Axis Oriented Lithium Mixed Ferrite Films Deposited by the PLD Method”. Chinese J. Phys., 40(6): 631-636.
Chinese J. Phys.
P. Samarasekara and F.J. Cadieu, (2001). “Magnetic and Structural Properties of RF Sputtered Polycrystalline Lithium Mixed Ferrimagnetic Films”. Chinese J. Phys., 39(6): 635-640.
Jpn. J. Appl. Phys.
P. Samarasekara and F.J. Cadieu, (2001). “Polycrystalline Ni ferrite films deposited by RF sputtering techniques”. Jpn. J. Appl. Phys., 40: 3176-3179.
J. Appl. Phys.
P. Samarasekara, R. Rani, F.J. Cadieu and S.A. Shaheen, (1996). “Variable texture NiOFe2O3 ferrite films prepared by pulsed laser deposition”. J. Appl. Phys., 79(8): 5425-5427.
Vidyodaya J. of Sci.
K. Tennakone, C.S. Lokuhetti and P. Samarasekara, (1995). “Ionic Conductivity of Prussian Blue Type Compounds Doped with Alkali Metal Chlorides”. Vidyodaya J. of Sci., 5(1), SriLanka: 117-122.
J. Appl. Phys.
H. Hegde, P. Samarasekara, R. Rani, A. Nanavarathna, K. Tracy, and F.J. Cadieu, (1994). “ Sputter synthesis of TbCu7 type Sm(CoFeCuZr) films with controlled easy axis orientation”. J. Appl. Phys., 76(10): 6760-6762.
J.Appl.Phys.
A. Navarathna, P. Samarasekara, H. Hegde, R. Rani and F.J. Cadieu, (1994). “Nitriding studies of aligned high anisotropy ThMn12-type NdFe11Co1-yMoyN film samples”. J.Appl.Phys., 76(10): 6068.
J. Appl. Phys.
H. Hegde, P. Samarasekara and F.J. Cadieu, (1994). “Nonepitaxial sputter synthesis of aligned strontium hexaferrites, SrO.6(Fe2O3), films”. J. Appl. Phys., 75(10): 6640-6642.
Phys. Stat. Sol.
K. Tennakone, S.W.M.S. Wickramanayake, P. Samarasekara and, C.A.N. Fernando, (1987). “Doping of Semiconductor Particles with Salts”. Phys. Stat. Sol., (a)104: K57-K60.