Magnetocaloric effect in a cluster-glass system Ho5Pd2-xNix

被引:2
|
作者
Toyoizumi, Saori [1 ]
Kitazawa, Hideaki [2 ]
Morita, Kengo [3 ]
Tamaki, Akira [1 ]
机构
[1] Tokyo Denki Univ, Grad Sch Adv Sci & Technol, Adachi Ku, 5 Senju Asahi Cho, Tokyo 1208551, Japan
[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
[3] Tokyo Denki Univ, Sch Engn, Adachi Ku, 5 Senju Asahi Cho, Tokyo 1208551, Japan
来源
TMU INTERNATIONAL SYMPOSIUM ON NEW QUANTUM PHASES EMERGING FROM NOVEL CRYSTAL STRUCTURE | 2016年 / 683卷
关键词
D O I
10.1088/1742-6596/683/1/012036
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In order to investigate the effect of chemical pressure on the large magnetocaloric effect in Ho5Pd2, we conducted X-ray diffraction, magnetization, and specific heat measurements on Ho5Pd2-xNix(0 <= x <= 1.0) rare-earth intermetallic compounds. The linear x dependence of the lattice constant a suggests that Ni is replaced with Pd in the case of Ho5Pd2-xNix (0 <= x <= 0.5). The spin-glass transition temperature T-g and paramagnetic Curie temperature theta(p) indicate a weak oscillatory x dependence. However, the magnetic entropy change -Delta S-m and the relative cooling power (RCP) are rapidly suppressed with increasing x. These large reductions in -Delta S-m and RCP cannot be explained only in terms of normal Ruderman-Kittel-Kasuya-Yoshida (RKKY)-type indirect exchange interactions.
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页数:6
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