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.
US 7,114,340 B2
Iowa State University Research Foundation, Inc.
Pecharsky, Alexandra O.; Gschneidner, Karl A. Jr.; and Pecharsky, Vitalij K., "Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys" (2006). Iowa State University Patents. 292.