Investigation of the magnetic and magnetocaloric properties in metamagnetic REFe2Si2 (RE = Pr and Nd) compounds

被引：23

作者：

Ma, Yihui ^{[1
,2
]}

Dong, Xiaoshi ^{[1
]}

Qi, Yang ^{[2
]}

Li, Lingwei ^{[1
,2
]}

机构：

[1] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Liaoning, Peoples R China

[2] Northeastern Univ, Inst Mat Phys & Chem, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2019年 / 471卷

基金：

中国国家自然科学基金;

关键词：

Rare earth based intermetallic compound; NdFe2Si2; PrFe2Si2; Magnetic property; Magnetocaloric effect; ENTROPY CHANGE; HO; TM; DY;

D O I：

10.1016/j.jmmm.2018.09.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystal structure, cryogenic magnetic and magnetocaloric properties in NdFe2Si2 and PrFe2Si2 compounds have been investigated. The NdFe2Si2 and PrFe2Si2 crystallized in the body-centered tetragonal structure with the space group of I4/mmm, and underwent first order magnetic transition from paramagnetic to antiferromagnetic (PM - AFM) around Neel temperatures T-N of 8.5 K and 15.5 K, respectively. Under an applied-field change of Delta H = 5 T, the maximum values of magnetic entropy change (-Delta S-M(max)) are 6.4 J/kg.K and 12.4 J/kg.K for PrFe2Si2 and NdFe2Si2, corresponding to relative cooling power (RCP) values of 0.8 J/cm(3) and 1.0 J/cm(3), respectively. Moreover, under low applied field change and at low temperatures, the PrFe2Si2 and NdFe2Si2 show an inverse MCE because of the existence of the AFM ordering, while under high external magnetic field change, a normal reversible MCE is observed, which is caused by first-order magnetic transition from antiferromagnetic (AFM) to ferromagnetic (FM) state.

引用

页码：25 / 29

页数：5

共 37 条

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