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Browsing Physics by Author "Jayasuriya, K.D."

Browsing Physics by Author "Jayasuriya, K.D."

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  • A Home Made Double Slab Pyranometer for Irradiance Measurements 
    Punyasena, M.A.; Jayasuriya, K.D. (Proceedings of the 44th Technical Session of the Sri Lanka Association for the Advancement of Science (SLAAS), 1988)
  • A Mössbauer effect study of barium ferrite ball-milled in air 
    Jayasuriya, K.D.; Kaczmarek, W.A.; Wu, E.; Campbell, S.J. (Hyperfine Interactions, 1994)
    The effects of dry-milling BaFe12O19 in air for periods of 190, 360, 590, 690 and 1000 h have been investigated by X-ray diffraction and M�ssbauer effect measurements. The sizes of the BaFe12O19 particles decrease on ...
  • A Mössbauer study of ball-milled Co?Fe?Si?B: I: dry milling 
    Jayasuriya, K.D.; Campbell, S.J.; Calka, A.; Jing, J. (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1993)
    X-ray diffraction and M�ssbauer effect measurements of ball-milled Co?Fe?Si?B material which had first been re-crystallized from amorphous melt-spun ribbon are presented. Fully amorphous powders have been obtained after ...
  • A Mössbauer study of ball-milled Co?Fe?Si?B: II: with surfactants 
    Jayasuriya, K.D.; Campbell, S.J.; Calka, A.; Jing, J. (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1993)
    The use of a range of organic surface active substances in the ball milling of Co?Fe?Si?B has been studied by X-ray diffraction and M�ssbauer effect measurements. Effects characteristic of superparamagnetic relaxation of ...
  • A Mössbauer study of the oxidation state of Fe in silicate melts 
    Jayasuriya, K.D.; O-Neill, H.S.C.; Berry, A.J.; Campbell, S.J. (American Mineralogist, 2004)
    Fe3+/?Fe ratios were determined from M�ssbauer spectra recorded for a series of 17 anorthite-diopside eutectic glasses containing 1 wt% 57Fe2O3 quenched from melts equilibrated over a range of oxygen fugacities from fO2~ ...
  • A specific heat study of natural haematite around the Morin transition and the effects of entrapped water 
    Jayasuriya, K.D.; Stewart, A.M.; Campbell, S.J. (Journal of Physics and Chemistry of Solids, 1985)
    The Morintransition in samples of natural haemitite has been examined by specificheat and M�ssbauer measurements. Specificheat measurements on as-received samples reveal an anomaly at ? 273.2 K and irregular behaviour at ...
  • A Study of CuInS2 Thin Films for Photovoltaic Applications 
    Wijesundera, R.P.; Nadesalingam, M.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; Jayanetti, J.K.D.S.; de Silva, K.T.L. (Proceedings of the Technical Session of Institute of Physics, 1999)
    Thin films of copper indium disulphide (CuInS2) on Ti Substrate were prepared by annealing potentiastatically electrodeposited Cu-In alloy in H2S gas at 5500 C. Films were characteristised by X-ray diffraction (XRD), ...
  • An experimental determination of the effect of pressure on the Fe3+/?Fe ratio of an anhydrous silicate melt to 3.0 GPa 
    Jayasuriya, K.D.; O-Neill, H.S.C.; Berry, A.J.; McCammon, C.C.; Campbell, S.J.; Foran, G. (American Mineralogist, 2006)
    The effect of pressure on the Fe3+/?Fe ratio of an anhydrous andesitic melt was determined from 0.4 to 3.0 GPa at 1400 �C with oxygen fugacity controlled internally by the Ru + RuO2 buffer. Values of Fe3+/?Fe were determined ...
  • Biodegradable Plantain Pith for Galvanic Cells 
    Jayashantha, N.; Jayasuriya, K.D.; Wijesundera, R.P. (2012)
    A number of locally available tubers/yams were studied as an electrolytic material for low cost environment friendly Galvanic cell. The cell was fabricated by sandwiching tissues made out of different types of tubers/yams ...
  • Computational Study of I-V characteristics of ITO/Cu2 O/Metal junctions, Technical Session of Institute of Physics 
    Wijesinghe, W.M.P.L.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (Processing of the Technical Session of Institute of Physics, 1999)
    A theoretical model for current-voltage (I-V) characteristics of back-to-back diode systems was developed using the ideal diode equation. A computer model was developed using the language C++ to fit the experimental data ...
  • Computational Study of I-V characteristics of ITO/Cu2/Metal junctions 
    Wijesinghe, W.M.P.L.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (1999)
    A theoretical model for current-voltage (I-V) characteristics of back-to-back diode systems was developed using the ideal diode equation. A computer model was developed using the language C++ to fit the experimental data ...
  • Construction of a Near Ideal Nanoammeter 
    Wijesundera, R.P.; Kalingamudali, S.R.D.; Jayasuriya, K.D. (1998)
    A near ideal ac/dc nanoammeter was constructed using two operational amplifiers (op-amp) and a voltmeter. Small currents were converted into a voltage by the first op-amp and this was amplified into a larger voltage by ...
  • Design of an Inexpensive Digital Watt-hour Meter 
    Chandana, A.W.S.; Wijesundera, R.P.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (2003)
    An inexpensive digital watt-hour meter has been designed and tested using MCap 7 simulation package since commercially available digital watt-hour meters are very expensive. One of the major usages of watt-hour meters is ...
  • Fabrication and Characterisation of CuinS2/ZnSe/Metal Structures for Solar Cell Applications 
    Kalingamudali, S.R.D.; Wijesundera, R.P.; Gunatunga, N.P.; Siripala, W.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (2000)
    Thin film solar cell structure of Ti/CuInS2/ZnSe/Metal was fabricated using simple electrochemical and sulphurisation techniques. Copper lndium Disulphide (CuInS2 thin films were prepared by sulphurisation of Cu-In alloy ...
  • Fabrication of CUO!CU2O Heterojunction and Its Local Structural Characterization 
    Siripala, W.; Wijesundera, R.P.; Perera, L.D.R.D.; Jayasuriya, K.D. (2011)
    Cuprous oxide (Cu20) thin films on Ti substrate were potentiostatically electrodeposited at -200 mV in an acetate bath. For the growth of p-type cupric oxide (CuO) thin films , CU20 thin film s were annealed at 500 oC (for ...
  • Growth and Characterisation of CuInS2 Thin Films 
    Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S.; Samantilleke, A.P.; Dharmadasa, I.M. (1999)
    Copper Indium Disulphide thin films were grown by electrodeposition of Cu-ln alloy followed by sulphurisation in H2S gas. It was observed that the ionic concentration of Cu2+/ In3+ in the electrodepositing bath determines ...
  • ITO/ u-Cu2O/ p-Cu2S thin film solar cell 
    Perera, L.D.R.D.; Wijesundara, R.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (Srilanka association for the advancement od science proceedings of 53rd Anuual Session., 1997)
  • ITO/n-Cu2O/p-CuxS Thin Film Solar Cell 
    Perera, L.D.R.D.; Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (Sri Lanka Association for the Advancement of Science, 1997)
  • Magnetic transitions in dysprosium: A specific-heat study 
    Jayasuriya, K.D.; Campbell, S.J.; Stewart, A.M. (Physical Review B, 1985)
    The magnetic transitions of the heavy rare-earth metal dysprosium have been examined by specific-heat measurements using a small single crystal (0.6782 g) and a large polycrystalline sample (43.25 g). A value for the latent ...
  • Photoelectrochemical Characterisation of ZnSe coated Copper Indium Sulphide Thin Film Electrodes 
    Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (1999)
    Capper Indium Sulphide thin films were prepared by sulphidation of Cu-In alloy on Ti substrate. Cu-In alloy was potentiostatically electrodeposited at ~1.4 V Vs SCE in an aqueous bath containing 5 mM CuCl2) 37.5m1 InCl3,1% ...

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