Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co4Nb2O9: A single-crystal neutron diffraction study

Lei Ding, Minseong Lee, Tao Hong, Zhiling Dun, Ryan Sinclair, Songxue Chi, Harish K. Agrawal, Eun Sang Choi, Bryan C. Chakoumakos, Haidong Zhou, and Huibo Cao
Phys. Rev. B 102, 174443 – Published 30 November 2020

Abstract

Through an analysis of single-crystal neutron diffraction data, we present the magnetic structure and magnetoelectric properties of Co4Nb2O9 under various magnetic fields. In zero field, neutron diffraction experiments below TN=27K reveal that the Co2+ moments order in the (ab) plane without any spin canting along the c axis, manifested by the magnetic symmetry C2/c. Along each Co chain parallel to the c axis, the moments of nearest-neighbor Co atoms order ferromagnetically with a small cant away from the next-nearest-neighbor Co moments. Under the applied magnetic field Ha, three magnetic domains were aligned with their major magnetic moments perpendicular to the magnetic field with no other observable magnetic transitions. The influences of magnetic fields on the magnetic structures associated with the observed magnetoelectric coupling are discussed.

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  • Received 24 February 2020
  • Revised 4 September 2020
  • Accepted 9 November 2020

DOI:https://doi.org/10.1103/PhysRevB.102.174443

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Lei Ding1, Minseong Lee2,3, Tao Hong1, Zhiling Dun4, Ryan Sinclair4, Songxue Chi1, Harish K. Agrawal1, Eun Sang Choi2, Bryan C. Chakoumakos1, Haidong Zhou4,2, and Huibo Cao1,*

  • 1Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 2National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306-4005, USA
  • 3Department of Physics, Florida State University, Tallahassee, Florida 32306-3016, USA
  • 4Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200, USA

  • *caoh@ornl.gov

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Vol. 102, Iss. 17 — 1 November 2020

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