Magnetic entropy change of V substituted Ni-Mn-Ga Heusler alloy

Title
Magnetic entropy change of V substituted Ni-Mn-Ga Heusler alloy
Authors
S.G. MinY.D. ZhangL. MalkinskiS.C. YuK.W. Lee김유찬
Keywords
Magnetic entropy; Ni-Mn-Ga alloy
Issue Date
2009-04
Publisher
Journal of applied physics
Citation
VOL 105, NO 7, 07A929-1-07A929-3
Abstract
The magnetization behaviors have been analyzed for Ni54Mn21−xVxGa25 (x=0,2,4) alloys which were prepared by conventional arc melting method in argon atmosphere. The Curie temperature Tc was found to be 325, 300, and 265 K and the austenitic transitiontemperature TA on heating was found to be 315, 217, and 124 K for x=0, 2, and 4, respectively. The magnetic characteristics were performed with a Quantum Design superconducting quantum interference device magnetometer in the field of up to 20 kOe. A large magnetic entropy change ΔS M , which is calculated from H versus M curves associated with the ferromagnetic-paramagnetic transitions, has been observed. The maximum ΔS M for an applied field of 2.0 T is 2.49, 1.92, and 1.81 J/kg K for x=0, 2, and 4, respectively.
URI
http://pubs.kist.re.kr/handle/201004/48419
ISSN
00218979
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KIST Publication > Article
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