Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co4Nb2 O9: 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; Huibo Cao

doi:10.1103/PhysRevB.102.174443

Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co4Nb2 O9: 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, Huibo Cao

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

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.

Original language	English
Article number	174443
Journal	Physical Review B
Volume	102
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.102.174443
State	Published - Nov 30 2020

Funding

L.D. thanks J. Rodriguez-Carvajal for helpful discussions. The research at Oak Ridge National Laboratory (ORNL) was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, Early Career Research Program Award No. KC0402010, under Contract No. DE-AC05-00OR22725. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by ORNL. The work at University of Tennessee was supported by DOE under Award No. DE-SC-0020254. A portion of this work was performed at the National High Magnetic Field Laboratory, supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.

Funders	Funder number
Office of Basic Energy Sciences	DE-AC05-00OR22725, DE-SC-0020254, KC0402010
State of Florida
National Science Foundation	DMR-1644779
U.S. Department of Energy
Office of Science
Oak Ridge National Laboratory

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title = "Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co4Nb2 O9: A single-crystal neutron diffraction study",

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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AU - Ding, Lei

AU - Lee, Minseong

AU - Hong, Tao

AU - Dun, Zhiling

AU - Sinclair, Ryan

AU - Chi, Songxue

AU - Agrawal, Harish K.

AU - Choi, Eun Sang

AU - Chakoumakos, Bryan C.

AU - Zhou, Haidong

AU - Cao, Huibo

PY - 2020/11/30

Y1 - 2020/11/30

N2 - 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.

AB - 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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Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co4Nb2 O9: A single-crystal neutron diffraction study

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