Large low-field magnetocaloric effect in MnCo0.95Ge1.14 alloy

Large low-field magnetocaloric effect in MnCo0.95Ge1.14 alloy

Large low-field magnetic entropy changes DeltaSM of 2.5 and 6.4Jkg-1K-1 in MnCo0.95Ge1.14 alloy were obtained near the ferromagnetic-paramagnetic transition temperature for magnetic field changes of 398 and 796kAm-1, respectively. The large DeltaSM is ascribed to the sharp drop in magnetization due...

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Veröffentlicht in:Scripta materialia 2007-09, Vol.57 (6), p.453-456
Hauptverfasser: Fang, Y.K., Yeh, C.C., Chang, C.W., Chang, W.C., Zhu, M.G., Li, W.
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Sprache:eng
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Zusammenfassung:Large low-field magnetic entropy changes DeltaSM of 2.5 and 6.4Jkg-1K-1 in MnCo0.95Ge1.14 alloy were obtained near the ferromagnetic-paramagnetic transition temperature for magnetic field changes of 398 and 796kAm-1, respectively. The large DeltaSM is ascribed to the sharp drop in magnetization due to the negative exchange striction of the lattice. The large low-field DeltaSM, low cost and tunable transition temperature indicate a great potential of MnCo0.95Ge1.14 alloy as a working material for magnetic refrigeration at intermediate temperatures.
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2007.05.036