Quantum magnetic properties of the spin-1/2 triangular-lattice antiferromagnet Ba2La2CoTe2O12

被引：27

作者：

Kojima, Yuki ^{[1
]}

Watanabe, Masari ^{[1
]}

Kurita, Nobuyuki ^{[1
]}

Tanaka, Hidekazu ^{[1
]}

Matsuo, Akira ^{[2
]}

Kindo, Koichi ^{[2
]}

Avdeev, Maxim ^{[3
,4
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] Australian Nucl Sci & Technol Org, Lucas Heights, NSW 2234, Australia

[4] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 17期

基金：

日本学术振兴会;

关键词：

HEISENBERG-ANTIFERROMAGNET; LIQUID STATE; ORDER; FIELD;

D O I：

10.1103/PhysRevB.98.174406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the crystal structure of Ba2La2CoTe2O12 determined by Rietveld analysis using x-ray powder-diffraction data. It was found from magnetic measurements that Ba2La2CoTe2O12 can be described as a spin-1/2 triangular-lattice antiferromagnet with easy-plane anisotropy at low temperatures. This compound undergoes a magnetic phase transition at T-N = 3.26 K to an ordered state with the 120 degrees structure. The magnetization curve exhibits the one-third plateau characteristic of triangular-lattice quantum antiferromagnets. The antiferromagnetic exchange interaction and the g factors parallel and perpendicular to the c axis were evaluated to be J/k(B) = 22 K, g(parallel to) = 3.5, and g(perpendicular to) = 4.5, respectively.

引用

页数：8

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