Magnetic ordering of Sm26Co11Ga6-type R26Co9-6Ga8-11 compounds (R = Gd-Ho, Tm)

被引：4

作者：

Morozkin, A., V ^{[1
]}

Knotko, A., V ^{[1
,2
]}

Yapaskurt, V. O. ^{[3
]}

Yao, Jinlei ^{[4
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, House 1,Bldg 3,GSP-2, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Fac Mat Sci, House 1,Bldg 73,GSP-1, Moscow 119991, Russia

[3] Geol Fac Moscow State Univ, Dept Petrol, Moscow 119992, Russia

[4] Suzhou Univ Sci & Technol, Sch Math & Phys, Jiangsu Key Lab Micro & Nano Heat Fluid Flow Tech, Suzhou 215009, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2020年 / 283卷

基金：

中国国家自然科学基金;

关键词：

Rare-earth compounds; Crystal structure; Magnetic properties; Coercivity; Magnetocaloric effect; CRYSTAL-STRUCTURE;

D O I：

10.1016/j.jssc.2019.121162

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The magnetic ordering of polycrystalline Sm26Co11Ga6-type {Gd, Dy, Ho, Tm}(26)Co9Ga8 and Tb26Co6-8Ga11-9 (space group P4/mbm, N 127, tP86) has been established using magnetic measurements. Gd26Co9Ga8 exhibits soft ferromagnetic with the Curie temperature of 124 K Tb26Co6Ga11, Tb26Co8Ga9, Dy26Co9Ga8 and Ho26Co9Ga8 show mixed ferro-antiferromagnic ordering with the Curie temperatures of 76 K, 74 K, 28 K and 16 K, respectively. They display permanent magnet properties at low temperatures. The novel Tm26Co9Ga8 demonstrates dominant antiferromagnetic ordering at 6 K, while it is a soft ferromagnet at 2 K. Among these compounds, Tb26Co8Ga9 exhibits largest magnetocaloric effect with magnetic entropy change of -9.2 J/kg.K at 76-81 K and relative large cooling power of similar to 560 J/kg (field change of 50 kOe), while Tb26Co6Ga11 is the best permanent magnet with a coercivity of 9 kOe, residual magnetization of 3.26 mu(B) per Tb and theoretical energy product of 200 kJ/m(3) at 2 K.

引用

页数：9

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