Magnetocaloric effect in the metamagnet ErRhSi compound

被引：7

作者：

Debnath, J. C. ^{[1
,2
]}

Nair, Harikrishnan S. ^{[2
]}

Strydom, Andre M. ^{[2
,3
]}

Kumar, K. Ramesh ^{[2
]}

Wang, Jianli ^{[4
]}

机构：

[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia

[2] Univ Johannesburg, Dept Phys, Highly Correlated Matter Res Grp, POB 524, ZA-2006 Auckland Pk, South Africa

[3] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany

[4] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

来源：

JOURNAL OF APPLIED PHYSICS | 2016年 / 120卷 / 23期

关键词：

MAGNETIC-PHASE-TRANSITIONS; GADOLINIUM COMPOUNDS; NEUTRON-DIFFRACTION; ER COMPOUNDS; HEAT;

D O I：

10.1063/1.4971959

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetocaloric effect is observed in the 1: 1: 1 compound ErRhSi, which is a metamagnet is reported in this paper. ErRhSi crystallizes in the orthorhombic space group Pnma, adopting the TiNiSi structure type, with lattice parameters a(angstrom) = 6.7903(5), b(angstrom) = 4.1881(3), and c(angstrom) = 7.3847(4). Our magnetic measurements confirm an antiferromagnetic phase transition at T-N approximate to 8.5 K, also supported by the specific heat measurement. Crystal field effects of Er3+ are suggested by the inverse magnetic susceptibility data which do not conform to an ideal Curie-Weiss behaviour and also by the total entropy that attains Rln (2) at T-N. Although the magnetic hysteresis indicates ErRhSi to be a soft magnet, several clear metamagnetic features are observed at 2K. Magnetic entropy change Delta S-M = -8.7 J/kg-K is observed at about 9K with the application of 5 T magnetic field. The corresponding adiabatic temperature change Delta T-ad is about 4K. Large magnetocaloric effects suggest that this material is suitable for the low temperature magnetic refrigeration. Published by AIP Publishing.

引用

页数：6

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