Successive electric polarization transitions induced by high magnetic field in the single-crystal antiferromagnet Co2Mo3O8

Y. S. Tang, G. Z. Zhou, L. Lin, R. Chen, J. F. Wang, C. L. Lu, L. Huang, J. H. Zhang, Z. B. Yan, X. M. Lu, X. K. Huang, X. P. Jiang, and J.-M. Liu
Phys. Rev. B 105, 064108 – Published 22 February 2022

Abstract

The polar antiferromagnet Co2Mo3O8 was recently reported as a new multiferroic material exhibiting remarkable second-order magnetoelectric (ME) coupling effect while no other metamagnetic transitions occurred at low magnetic field. Herein, we have investigated the ME phenomena under high magnetic field (up to 60 T) in Co2Mo3O8 single crystals and observed unique ME response associated with the changes in the hidden magnetic moment on the honeycomb lattice. Two spin-flop transitions are unambiguously defined at Hc127T and Hc231T under H along the c axis at 1.7 K, accompanied by two successive colossal changes of electric polarization. The results on the anisotropy of magnetoelectricity as well as the angular-dependent polarization are well consistent with the ME tensor prediction, providing a better approach to understand the evolution of magnetic structures under high magnetic field. Therefore, the hidden magnetic transitions and distinctive magnetoelectricity provide a unique platform on which the ME coupling mechanism in the presence of rich magnetic phase transitions can be explored in this 238 family.

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  • Received 19 October 2021
  • Revised 14 January 2022
  • Accepted 3 February 2022

DOI:https://doi.org/10.1103/PhysRevB.105.064108

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Y. S. Tang1, G. Z. Zhou1, L. Lin2,*, R. Chen3, J. F. Wang3, C. L. Lu3, L. Huang1, J. H. Zhang1, Z. B. Yan1, X. M. Lu1, X. K. Huang4, X. P. Jiang4, and J.-M. Liu1

  • 1Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • 2Department of Applied Physics, College of Science, Nanjing Forestry University, Nanjing 210037, China
  • 3Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 4School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China

  • *llin@njfu.edu.cn

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Issue

Vol. 105, Iss. 6 — 1 February 2022

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