A Single-Crystal Neutron Diffraction Study on Magnetic Structure of the Quasi-One-Dimensional Antiferromagnet SrCo$_{2}$V$_{2}$O$_{8}$
Juan-Juan Liu1, Jin-Chen Wang1, Wei Luo1, Jie-Ming Sheng1, Zhang-Zhen He2, S. A. Danilkin3, Wei Bao1**
1Department of Physics, Renmin University of China, Beijing 100872 2State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 3Bragg Institute, ANSTO, Locked Bag 2001, Kirrawee DC NSW 2232, Australia
Abstract：The magnetic structure of the spin-chain antiferromagnet SrCo$_{2}$V$_{2}$O$_{8}$ is determined by single-crystal neutron diffraction experiment. The system undergoes a long-range magnetic order below the critical temperature $T_{\rm N}$=4.96 K. The moment of $2.16 \mu_{_{\rm B}}$ per Co at $1.6$ K in the screw chain running along the $c$ axis alternates in the $c$ axis. The moments of neighboring screw chains are arranged antiferromagnetically along one in-plane axis and ferromagnetically along the other in-plane axis. This magnetic configuration breaks the four-fold symmetry of the tetragonal crystal structure and leads to two equally populated magnetic twins with the antiferromagnetic vector in the $a$ or $b$ axis. The very similar magnetic state to the isostructural BaCo$_{2}$V$_{2}$O$_{8}$ warrants SrCo$_{2}$V$_{2}$O$_{8}$ as another interesting half-integer spin-chain antiferromagnet for investigation on quantum antiferromagnetism.
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
引用本文:
. [J]. 中国物理快报, 2016, 33(03): 37502-037502.
Juan-Juan Liu, Jin-Chen Wang, Wei Luo, Jie-Ming Sheng, Zhang-Zhen He, S. A. Danilkin, Wei Bao. A Single-Crystal Neutron Diffraction Study on Magnetic Structure of the Quasi-One-Dimensional Antiferromagnet SrCo$_{2}$V$_{2}$O$_{8}$. Chin. Phys. Lett., 2016, 33(03): 37502-037502.
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