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Browsing Physics by Author "Stewart, A.M."

Browsing Physics by Author "Stewart, A.M."

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  • 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 ...
  • 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 ...
  • Specific heat study of a holmium single crystal 
    Jayasuriya, K.D.; Campbell, S.J.; Stewart, A.M. (Journal of Physics F: Metal Physics, 1985)
    The magnetic transition at the Neel temperature, TN, of the heavy rare-earth metal holmium has been examined by specific heat measurements. The transition at TN=(132.245+or-0.080)K is found to be continuous and the data ...
  • Specific heat study of the transition from ferromagnetism to antiferromagnetism in terbium 
    Jayasuriya, K.D.; Campbell, S.J.; Stewart, A.M.; Gopal, E.S.R. (Journal of Magnetism and Magnetic Materials, 1984)
    The specificheat of single crystal terbium has been measured over the range 200?400 K. A value for the latent heat of (13.6 � 0.6) J mol?1 is obtained at the first order antiferromagnetic to ferromagnetic transition ...
  • The critical specific heat of terbium 
    Jayasuriya, K.D.; Gopal, E.S.R.; Campbell, S.J.; Stewart, A.M. (Journal of Physics F: Metal Physics, 1983)
    Specific heat measurements have been carried out on a high-purity single crystal of terbium of mass 3.734 g between temperatures of 200 and 400K. The data around the Neel temperature TN, have been analysed in terms of the ...
  • The specific heat capacity of GE varnish (200-400K) 
    Jayasuriya, K.D.; Campbell, S.J.; Stewart, A.M. (Journal of Physics E: Scientific Instruments, 1982)
    The specific heat capacity of GE varnish, a commonly used adhesive and insulator, is found to vary linearly with temperature over the range 200-330K. The deviation of the heat capacity above this temperature is associated ...
  • The specific heat of samarium metal (80-400 K) 
    Jayasuriya, K.D.; Stewart, A.M.; Campbell, S.J. (Materials Chemistry and Physics, 1986)
    We have measured the specific heat of several high purity polycrystalline specimens of samarium metal over the temperature range 80 K to 400 K. A broad peak is observed at TNh ~106K, the temperature at which antiferromagnetic ...

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