期刊
APPLIED PHYSICS LETTERS
卷 102, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4798318
关键词
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资金
- National Basic Research Program of China [2012CB619405]
- National Natural Science Foundation of China [51021061, 11174352, 51171206]
An effective scheme of isostructural alloying was applied to establish a Curie-temperature window in isostructural MnNiGe-CoNiGe system. With the simultaneous accomplishment of decreasing structural-transition temperature and converting antiferromagnetic martensite to ferromagnetic state, a 200 K Curie-temperature window was established between Curie temperatures of austenite and martensite phases. In the window, a first-order magnetostructural transition between paramagnetic austenite and ferromagnetic martensite occurs with a sharp jump in magnetization, showing a magnetic entropy change as large as -40 J kg(-1) K-1 in a 50 kOe field change. This giant magnetocaloric effect enables Mn1-xCoxNiGe to become a potential magnetic refrigerant. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798318]
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