Spin-glass state and reversed magnetic anisotropy induced by Cr doping in the Kitaev magnet α-RuCl3

被引：23

作者：

Bastien, G. ^{[1
]}

Roslova, M. ^{[2
,3
]}

Haghighi, M. H. ^{[1
]}

Mehlawat, K. ^{[1
]}

Hunger, J. ^{[2
]}

Isaeva, A. ^{[1
,4
]}

Doert, T. ^{[2
]}

Vojta, M. ^{[5
]}

Buechner, B. ^{[1
,4
]}

Wolter, A. U. B. ^{[1
]}

机构：

[1] IFW Dresden, Leibniz Inst Festkorper & Werkstoffforsch, D-01171 Dresden, Germany

[2] Tech Univ Dresden, Fak Chem & Lebensmittelchem, D-01062 Dresden, Germany

[3] Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden

[4] Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01062 Dresden, Germany

[5] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2019年 / 99卷 / 21期

基金：

欧盟地平线“2020”;

关键词：

Ac susceptibility - Cr content - Cr-doping - Freezing temperatures - Isotropic Heisenberg - Long range magnetic order - Magnetization measurements - Spin glass state;

D O I：

10.1103/PhysRevB.99.214410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties of the substitution series Ru1-xCrxCl3 were investigated to determine the evolution from the anisotropic Kitaev magnet alpha-RuCl3 with J(eff) = 1/2 magnetic Ru(3+ )ions to the isotropic Heisenberg magnet CrCl3 with S = 3/2 magnetic Cr3+ ions. Magnetization measurements on single crystals revealed a reversal of the magnetic anisotropy under doping, which we argue to arise from the competition between anisotropic Kitaev and off-diagonal interactions on the Ru-Ru links and approximately isotropic Cr-Ru and isotropic Cr-Cr interactions. In addition, combined magnetization, ac susceptibility, and specific-heat measurements clearly show the destabilization of the long-range magnetic order of alpha-RuCl3 in favor of a spin-glass state of Ru1-xCrxCl3 for a low doping of x similar or equal to 0.1. The corresponding freezing temperature as a function of Cr content shows a broad maximum around x similar or equal to 0.45.

引用

页数：11

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