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Demonstrative Experiments on the Magnetocaloric Effect of Gadolinium  

이종석 (강릉대학교 정밀기계공학과)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.4, 2004 , pp. 383-389 More about this Journal
Abstract
Magnetic refrigeration is based on the magnetocaloric effect (MCE) - the ability of some materials to heat up when magnetized and cool down when removed from the magnetic field. The available techniques for studying the MCE we: (1) direct measurements by monitoring the change in the material's temperature during the application or removal of the magnetic field; and (2) indirect calculations from the experimental data of magnetization and/or specific heat as a function of the temperature and magnetic field. The MCE of gadolinium (Gd) has been demonstrated by direct measurements of temperature change, and isothermal magnetic entropy changes and adiabatic temperature changes have been calculated.
Keywords
Magnetocaloric effect; Gadolinium; Direct measurement; Magnetization; Specific heat;
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