Magnetism and ESR of the Seff= 12 antiferromagnet BaCo2(SeO3)3·3 H2 O with dimer-chain structure

被引：0
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作者：
Liu, X.C. [1 ]
Ouyang, Z.W. [1 ]
Xiao, T.T. [1 ]
Cao, J.J. [1 ]
Wang, Z.X. [1 ]
Xia, Z.C. [1 ]
He, Z.Z. [2 ]
Tong, W. [3 ]
机构：
[1] Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan,430074, China
[2] State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou,350002, China
[3] Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei,230031, China
来源：
Physical Review B | 2022年 / 105卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Selenium compounds - Barium compounds - Antiferromagnetic materials - Magnetic fields - Saturation magnetization - Specific heat;
D O I：
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学科分类号：
摘要：
We report the magnetism and ESR of the Seff=1/2 compound BaCo2(SeO3)3·3H2O with dimer-chain structure. The magnetic susceptibility and heat capacity show that the compound is antiferromagnetically ordered at TN=7.6 K. The magnetization M(H) curve at 2 K presents a spin-flop transition within 2.6-3.0 T when the magnetic field is applied along the ab plane (H⊥c), pointing to the easy axis-like anisotropy. In high magnetic field, the magnetization increases nearly linearly until saturation at about 22 T, indicating a classical-like behavior. The magnetization process can be described with the intradimer exchange J1=-20.0 K and interdimer exchanges J2=-14.6 K and J3=-6.2 K. Thus, BaCo2(SeO3)3·3H2O is approximately a three-dimensional antiferromagnet, although structurally it contains dimer chains. © 2022 American Physical Society.
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