Giant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window

E. K. Liu, H. G. Zhang, G. Z. Xu, X. M. Zhang, R. S. Ma, W. H. Wang, J. L. Chen, H. W. Zhang, G. H. Wu, L. Feng, Xixiang Zhang

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94 Scopus citations

Abstract

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− x Co x NiGe to become a potential magnetic refrigerant.
Original languageEnglish (US)
Pages (from-to)122405
JournalApplied Physics Letters
Volume102
Issue number12
DOIs
StatePublished - Mar 28 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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