Distinct spin glass behavior and excellent magnetocaloric effect in Er20Dy20Co20Al20RE20 (RE = Gd, Tb and Tm) high-entropy bulk metallic glasses

被引：83

作者：

Li, Jun ^{[1
,2
]}

Xue, Lin ^{[1
,2
]}

Yang, Weiming ^{[2
,3
]}

Yuan, Chenchen ^{[1
,2
]}

Huo, Juntao ^{[4
]}

Shen, Baolong ^{[1
,2
,3
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China

[2] Jiangsu Key Lab Adv Metall Mat, Nanjing 211189, Jiangsu, Peoples R China

[3] China Univ Min & Technol, Inst Mass Amorphous Met Sci, Xuzhou 221116, Peoples R China

[4] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China

来源：

INTERMETALLICS | 2018年 / 96卷

基金：

中国国家自然科学基金;

关键词：

RE-based high-entropy bulk metallic glasses; Spin glass; Magnetocaloric effect; Refrigerant capacity; THERMAL-STABILITY; ALLOY; FLOW;

D O I：

10.1016/j.intermet.2018.03.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Er20Dy20Co20Al20RE20 (RE = Gd, Tb and Tm) high-entropy bulk metallic glasses (HE BMGs) with tunable magnetocaloric properties were prepared successfully. As a result, a spin glass behavior was observed below 50 K in this HE BMG system. In addition, we found that the Curie temperature (T-c) can be easily tuned from 13 to 43 K by alloying different rare earth (RE) elements, following a good de Gennes factor dependence. The peak of magnetic entropy change (vertical bar Delta S-M(max)vertical bar) for Gd-, Tb- and Tm-containing glassy alloy under a magnetic field of 5 T is 9.1, 8.6 and 11.9 J kg(-1) K-1, respectively, which leads to obtain the maximum refrigerant capacity (RC) of 619, 525, and 405 J kg(-1) for the Er20Dy20Co20Al20RE20 (RE = Gd, Tb and Tm) HE BMGs, respectively. The glass forming ability (GFA), T-c, Delta S-M and RC can be widely tuned by alloying different RE elements. These results suggest that these HE BMGs are promising magnetic refrigerants at low temperature in the future.

引用

页码：90 / 93

页数：4

共 30 条

[1] INTERMETALLIC COMPOUNDS OF RARE-EARTH AND 3D TRANSITION-METALS [J].