Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys

Date
2006-10-03
Authors
Pecharsky, Alexandra
Gschneidner, Karl
Pecharsky, Vitalij
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Iowa State University Research Foundation, Inc.
Abstract

An alloy made of heat treated material represented by Gd5(SixGe1−x)4 where 0.47≦x≦0.56 that exhibits a magnetic entropy change (−ΔSm) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per million, and a magnetoresistance of at least 5 percent at a temperature of about 300K and below, and method of heat treating the material between 800 to 1600 degrees C. for a time to this end.

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