Magnetic-entropy change in Mn/sub 1.1/Fe/sub 0.9/P/sub 1-x/Ge/sub x/ compounds

作者：W. Dagula, O. Tegus, B. Fuquan, L. Zhang, P.Z. Si, Mengshi Zhang, Wangdi Zhang, E. Brück, F.R. de Boer, K.H.J. Buschow · 发表于：IEEE Transactions on Magnetics · 年份：2005 · DOI：10.1109/tmag.2005.854774 · 被引用次数：62 · 研究领域：Magnetic and transport properties of perovskites and related materials、Shape Memory Alloy Transformations、Magnetic Properties of Alloys

The magnetic and magnetocaloric properties of Mn/sub 1.1/Fe/sub 0.9/p/sub 1-x/Ge/sub x/ compounds with x=0.20,0.22,0.23,0.26, and 0.30 have been investigated. In the composition range x from 0.20 to 0.30, the compounds crystallize in the Fe/sub 2/P-type hexagonal structure. The Curie temperature of the compounds strongly increases with increasing Ge contents. A history dependence of the magnetic phase transition is observed in this compound system. The optimum composition range and the temperature range of the Mn/sub 1.1/ Fe/sub 0.9/P/sub 1-x/Ge/sub x/ compounds for magnetic refrigeration applications have been determined. In the composition range x from 0.20 to 0.23, the compounds exhibit large magnetic-entropy change in a low magnetic field.