中国物理B ›› 2022, Vol. 31 ›› Issue (4): 47501-047501.doi: 10.1088/1674-1056/ac3818

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Incommensurate-commensurate magnetic phase transition in double tungstate Li2Co(WO4)2

Xiyu Chen(陈西煜)1, Ning Ding(丁宁)2, Meifeng Liu(刘美风)1,†, Tao Zou(邹涛)3,‡, V. Ovidiu Garlea4, Jingwen Gong(龚婧雯)1, Fei Liu(刘飞)1, Yunlong Xie(谢云龙)1, Lun Yang(杨伦)1, Shuhan Zheng(郑书翰)1, Xiuzhang Wang(王秀章)1, Shuai Dong(董帅)2,§, T. Charlton4, and Jun-Ming Liu(刘俊明)1,5   

  1. 1 Institute for Advanced Materials, Hubei Normal University, Huangshi 435002, China;
    2 School of Physics, Southeast University, Nanjing 211189, China;
    3 Collaborative Innovation Center of Light Manipulations and Applications, Shangdong Normal University, Jinan 250358, China;
    4 Neutron Scattering División, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;
    5 Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • 收稿日期:2021-11-01 修回日期:2021-11-08 接受日期:2021-11-10 出版日期:2022-03-16 发布日期:2022-03-25
  • 通讯作者: Meifeng Liu, Tao Zou, Shuai Dong E-mail:lmfeng1107@hbnu.edu.cn;taozoucn@gmail.com;sdong@seu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11834002, 12074111, and 11704109) and the National Key R&D Project of China (Grant No. 2016YFA0300101).

Incommensurate-commensurate magnetic phase transition in double tungstate Li2Co(WO4)2

Xiyu Chen(陈西煜)1, Ning Ding(丁宁)2, Meifeng Liu(刘美风)1,†, Tao Zou(邹涛)3,‡, V. Ovidiu Garlea4, Jingwen Gong(龚婧雯)1, Fei Liu(刘飞)1, Yunlong Xie(谢云龙)1, Lun Yang(杨伦)1, Shuhan Zheng(郑书翰)1, Xiuzhang Wang(王秀章)1, Shuai Dong(董帅)2,§, T. Charlton4, and Jun-Ming Liu(刘俊明)1,5   

  1. 1 Institute for Advanced Materials, Hubei Normal University, Huangshi 435002, China;
    2 School of Physics, Southeast University, Nanjing 211189, China;
    3 Collaborative Innovation Center of Light Manipulations and Applications, Shangdong Normal University, Jinan 250358, China;
    4 Neutron Scattering División, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;
    5 Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2021-11-01 Revised:2021-11-08 Accepted:2021-11-10 Online:2022-03-16 Published:2022-03-25
  • Contact: Meifeng Liu, Tao Zou, Shuai Dong E-mail:lmfeng1107@hbnu.edu.cn;taozoucn@gmail.com;sdong@seu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11834002, 12074111, and 11704109) and the National Key R&D Project of China (Grant No. 2016YFA0300101).

摘要: Magnetic susceptibility, specific heat, and neutron powder diffraction measurements have been performed on polycrystalline Li$_{2}$Co(WO$_{4}$)$_{2}$ samples. Under zero magnetic field, two successive magnetic transitions at $T_{\rm N1}\sim 9.4$ K and $T_{\rm N2}\sim 7.4$ K are observed. The magnetic ordering temperatures gradually decrease as the magnetic field increases. Neutron diffraction reveals that Li$_{2}$Co(WO$_{4}$)$_{2}$ enters an incommensurate magnetic state with a temperature dependent $\bm k$ between $T_{\rm N1}$ and $T_{\rm N2}$. The magnetic propagation vector locks-in to a commensurate value $\bm k = (1/2, 1/4, 1/4)$ below $T_{\rm N2}$. The antiferromagnetic structure is refined at 1.7 K with Co$^{2+}$ magnetic moment 2.8(1) $\mu_{\rm B}$, consistent with our first-principles calculations.

关键词: Li2Co(WO4)2, incommensurate-commensurate magnetic transition

Abstract: Magnetic susceptibility, specific heat, and neutron powder diffraction measurements have been performed on polycrystalline Li$_{2}$Co(WO$_{4}$)$_{2}$ samples. Under zero magnetic field, two successive magnetic transitions at $T_{\rm N1}\sim 9.4$ K and $T_{\rm N2}\sim 7.4$ K are observed. The magnetic ordering temperatures gradually decrease as the magnetic field increases. Neutron diffraction reveals that Li$_{2}$Co(WO$_{4}$)$_{2}$ enters an incommensurate magnetic state with a temperature dependent $\bm k$ between $T_{\rm N1}$ and $T_{\rm N2}$. The magnetic propagation vector locks-in to a commensurate value $\bm k = (1/2, 1/4, 1/4)$ below $T_{\rm N2}$. The antiferromagnetic structure is refined at 1.7 K with Co$^{2+}$ magnetic moment 2.8(1) $\mu_{\rm B}$, consistent with our first-principles calculations.

Key words: Li2Co(WO4)2, incommensurate-commensurate magnetic transition

中图分类号:  (Spin arrangements in magnetically ordered materials (including neutron And spin-polarized electron studies, synchrotron-source x-ray scattering, etc.))

  • 75.25.-j
75.50.Ee (Antiferromagnetics) 75.47.Lx (Magnetic oxides)