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Title: Quantum magnetic properties of the spin-1/2 triangular-lattice antiferromagnet Ba2La2CoTe2O12
Authors: Kojima, Y
Watanabe, M
Kurita, N
Tanaka, H
Matsuo, A
Kindo, K
Avdeev, M
Keywords: Crystal structure
Neutron diffraction
X-ray diffraction
Phase transformations
Exchange interactions
Specific heat
Issue Date: 5-Nov-2018
Publisher: American Physical Society
Citation: Kojima, Y., Watanabe, M., Kurita, N., Tanaka, H., Matsuo, A., Kindo, K., & Avdeev, M. (2018). Quantum magnetic properties of the spin-1/2 triangular-lattice antiferromagnet Ba2La2CoTe2O12. Physical Review B, 98(17), 174406. doi:10.1103/PhysRevB.98.174406
Abstract: 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-12 triangular-lattice antiferromagnet with easy-plane anisotropy at low temperatures. This compound undergoes a magnetic phase transition at TN=3.26K to an ordered state with the 120∘ 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/kB=22K,g∥=3.5, and g⊥=4.5, respectively. ©2018 American Physical Society
ISSN: 2469-9969
Appears in Collections:Journal Articles

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