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.
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收藏
页数：8
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