Influence of Annealing Conditions on Structure and Critical Parameters of Ni50Mn37Sn13 Magnetocaloric Material

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Title Influence of Annealing Conditions on Structure and Critical Parameters of Ni50Mn37Sn13 Magnetocaloric Material
 
Creator Dan, Nguyen Huy
An, Nguyen Manh
 
Subject Giant magnetocaloric effect, Heusler alloys, Arrott-Noaks Plot, Magnetic transition

 
Description In this paper, we present the influence of annealing conditions on structure and magnetic behavior of Ni\(_{50}\)Mn\(_{37}\)Sn\(_{13}\) magnetocaloric alloy prepared by arc-melting technique. The results show that the almost single phase of the full Heusler structure of Ni\(_{2}\)MnSn could be achieved by appropriate annealing. The transformation between martensite and austenite phases, and multi-magnetic phase behavior are observed more clearly with higher fraction of Ni\(_{2}\)MnSn phase. By using Arrott-Noaks method, critical parameters were determined to be \(\beta   0.464 \pm  0.021\), \(\gamma  = 1.117 \pm  0.073\) and \(\delta  = 3.41\), which lay between mean-field model (\(\beta  = 0.5\) and \(\gamma = 1\), \(\delta  = 3\)) with long-range ferromagnetic orders and 3D Heisenberg model (\(\beta  = 0.365\), \(\gamma = 1.336\), \(\delta {\rm g}= 4.66\)) with short-range ferromagnetic orders. The calculated results are in good accordance with the experimentally observed coexistence of weak-ferromagnetic martensite and strong-ferromagnetic austenite phases.
 
Publisher Publishing House for Science and Technology, Vietnam Academy of Science and Technology
 
Contributor
 
Date 2014-03-23
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion


 
Format application/pdf
 
Identifier http://vjs.ac.vn/index.php/cip/article/view/2862
10.15625/0868-3166/24/1/2862
 
Source Communications in Physics; Vol 24, No 1 (2014); 79
Communications in Physics; Vol 24, No 1 (2014); 79
0868-3166
0868-3166
 
Language eng
 
Relation http://vjs.ac.vn/index.php/cip/article/view/2862/3896
http://vjs.ac.vn/index.php/cip/article/downloadSuppFile/2862/631
 

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