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

Nguyen Huy Dan, Nguyen Manh An
Author affiliations

Authors

  • Nguyen Huy Dan
  • Nguyen Manh An Hong Duc University, 565 Quang Trung, Dong Ve, Thanh Hoa.

DOI:

https://doi.org/10.15625/0868-3166/24/1/2862

Keywords:

Giant magnetocaloric effect, Heusler alloys, Arrott-Noaks Plot, Magnetic transition

Abstract

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.

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Published

23-03-2014

How to Cite

[1]
N. H. Dan and N. M. An, “Influence of Annealing Conditions on Structure and Critical Parameters of Ni50Mn37Sn13 Magnetocaloric Material”, Comm. Phys., vol. 24, no. 1, p. 79, Mar. 2014.

Issue

Section

Papers
Received 07-01-2014
Published 23-03-2014