The magnetocaloric effect and low temperature specific heat of SmNi |
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| Authors: | H. Drulis A. Hackemer Yu.L. Yaropolov V.N. Verbetsky |
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| Affiliation: | a Polish Academy of Sciences, Trzebiatowski Institute of Low Temperature and Structure Research, P.O. Box 1410, 50-950 Wroclaw 2, Polandb Lomonosov Moscow State University, GSP-3, Leninskie Gory, Moscow, 119992, Russiac International laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland |
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| Abstract: | The magnetocaloric effect (MCE) in a magnetic SmNi sample was evaluated from magnetization and heat capacity measurements. The MCE phenomena in the vicinity of magnetic phase transitions in terms of magnetic entropy change,  , and adiabatic temperature change,  , are reported. Isothermal magnetization  measurements at several temperatures around the transition  were carried out and used for  versusT calculations. A similar dependence of the magnetic entropy change  was evaluated from heat capacity Cp(T) measurements under zero field and 5 T. The SmNi system provides magnetic refrigerants that induce an adiabatic cooling of about  during the magnetization process with a field of 5 T in the temperature range of 35-45 K. The temperature dependence of Cp(T) is analyzed in terms of the magnetic and the lattice contributions. |
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| Keywords: | A. Magnetically ordered materials B. Magnetocaloric effect C. Thermodynamic properties E. Heat capacity measurements |
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