Magnetocaloric Effect, Specific Heat, and Entropy of Iron-Substituted Gadolinium Gallium Garnets Gd3(Ga1-xFex)5O12
作者： Koichi Matsumoto , Ayumi Matsuzaki , Koji Kamiya , Takenori Numazawa
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摘要: A series of Gd3(Ga1-xFex)5O12 (GGIG) compounds for magnetic refrigerants were characterized by magnetization and specific heat measurements. For comparison, the base compound gadolinium gallium garnet (GGG) was also measured. From measurements, entropy change external field confirmed to be enhanced addition iron, as previously reported National Institute Standards Technology (NIST) group. The data obtained in various fields enabled establishment temperature (T–S) diagrams, which are essential thermal cycle analysis. It has been shown that GGIGs with high iron content have a large zero field, suitable regenerative cycle.
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