期刊
APPLIED PHYSICS LETTERS
卷 99, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3643142
关键词
composite materials; entropy; erbium alloys; ferromagnetic materials; ferromagnetic-paramagnetic transitions; holmium alloys; magnetic cooling; nickel alloys; paramagnetic materials; spin dynamics
资金
- National Natural Science Foundation of China [50731007, 11004204, 51001077]
- Hi-Tech Research and Development program of China
- Chinese Academy of Sciences
Magnetic and magnetocaloric properties of R3Ni2 (R = Ho and Er) compounds have been investigated. Both Ho3Ni2 and Er3Ni2 compounds undergo two successive phase transitions: spin reorientation transition and second-order ferromagnetic-paramagnetic transition. The maximal values of magnetic entropy change are achieved to be 21.7 J kg(-1) K-1 for Ho3Ni2 and 19.5 J kg(-1) K-1 for Er3Ni2 for a field change of 0-5 T. A large refrigerant capacity (RC) of 496 J kg(-1) in the composite material is also obtained. Large reversible magnetocaloric effect and RC indicate the potentiality of R3Ni2 (R = Ho and Er) compounds as candidates for low-temperature magnetic refrigerant. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3643142]
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