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Magnetic and magnetocaloric properties of ternary Gd-Co-Al bulk metallic glasses |
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| Authors: | H Fu M Zou |
| Affiliation: | a Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China b The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020, USA |
| Abstract: | Bulk metallic glasses (BMGs) with compositions of Gd55CoxAl45−x (15 ≤ x ≤ 30) and Gd60CoyAl40−y (15 ≤ y ≤ 30) were synthesized by an injection casting technique. Temperature dependence of magnetization of the BMGs indicates that their Curie temperatures can be tailored between 96 and 143 K by varying Gd and Co concentration. The magnetic entropy changes of the BMGs are greater than 9.0 J/kg K except for the Gd55Co30Al15 glass that exhibits a reduced magnetization due to its large Co content. The relative cooling powers of the BMGs are greater than those of any other crystalline compounds and decrease with the increasing Co content. |
| Keywords: | Rare earth Bulk metallic glass Magnetocaloric effect |
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