Magnetic entropy change and refrigerant capacity in GdFeAl compound

by Q. Y. Dong, B. G. Shen, J. Chen, J. Shen, H. W. Zhang, J. R. Sun
Journal of Applied Physics ()
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Abstract

Magnetic properties and magnetocaloric effect of GdFeAl compound have been investigated. The small saturated magnetization of GdFeAl compound is caused by the antiferromagnetic coupling between the magnetic moments of Gd and Fe atoms. A second-order magnetic phase transition is confirmed around 265 K. The maximum magnetic entropy change for GdFeAl compound is 3.7 J kg(-1) K-1 under the field change of 0-5 T. However, a large refrigerant capacity of 420 J kg(-1) is obtained, which is due to the large full width at half peak of the magnetic entropy change versus temperature curve in GdFeAl compound. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3059372]

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