Giant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window
AuthorsLiu, E. K.
Zhang, H. G.
Xu, G. Z.
Zhang, X. M.
Ma, R. S.
Wang, W. H.
Chen, J. L.
Zhang, H. W.
Wu, G. H.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Advanced Nanofabrication, Imaging and Characterization Core Lab
Permanent link to this recordhttp://hdl.handle.net/10754/552267
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AbstractAn 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.
CitationGiant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window 2013, 102 (12):122405 Applied Physics Letters
JournalApplied Physics Letters