Low field giant magnetocaloric effect in RNiBC (R = Er and Gd) and enhanced refrigerant capacity in its composite materials

被引：94

作者：

Li, Lingwei ^{[1
,2
]}

Kadonaga, Michiaki ^{[1
]}

Huo, Dexuan ^{[1
]}

Qian, Zhenghong ^{[3
]}

Namiki, Takahiro ^{[2
]}

Nishimura, Katsuhiko ^{[2
]}

机构：

[1] Hangzhou Dianzi Univ, Inst Mat Phys, Hangzhou 310018, Zhejiang, Peoples R China

[2] Toyama Univ, Grad Sch Sci & Engn, Toyama 9308555, Japan

[3] Hangzhou Dianzi Univ, Ctr Integrated Spintron Devices, Hangzhou 310018, Zhejiang, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 12期

基金：

中国国家自然科学基金; 日本学术振兴会;

关键词：

TB; HO; DY; SUPERCONDUCTIVITY; MAGNETORESISTANCE; TRANSITIONS; ORDER;

D O I：

10.1063/1.4752738

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic properties and magnetocaloric effect (MCE) in RNiBC (R = Er and Gd) compounds and its composite materials were investigated. A giant low field reversible MCE was observed in RNiBC compounds at 5 and 13 K for R = Er and Gd, respectively. Under a relative low field change of 2 T, the maximum values of magnetic entropy change (-Delta S-M(max)) reach 17.1 and 9.3 J/kg K for R = Er and Gd, respectively. A table-like MCE in the temperature of 4-20 K and enhanced refrigerant capacity (RC) were found in the ErNiBC-GdNiBC composite materials. For the magnetic field changes of 1 T and 2 T, the maximum improvement of RC reach 31% (19%) and 30% (8%), in comparison with that of individual compound ErNiBC (GdNiBC), respectively. The excellent MCE properties make the RNiBC composite materials attractive for low temperature magnetic refrigeration. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752738]

引用

页数：4

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