Charge transfer enhanced magnetic correlations in type-II multiferroic Co3TeO6

Chi Hung Lee, Erdembayalag Batsaikhan, Ma Hsuan Ma, Wen Hsien Li, Chin Wei Wang, Chun Min Wu, Hung Duen Yang, Jeffrey W. Lynn, Helmuth Berger

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetic structure of the Co ions in monoclinic Co3TeO6 in the antiferroelectric state at 16 K has been determined by neutron powder together with single-crystal diffractions. The indices of the magnetic reflections that appear at the incommensurate positions were determined by diffractions from a single crystal, which allow to uniquely identify the magnetic modulation vector. There are two crystallographically distinct Co layers. Magnetic incommensurability appears in the Co spins in the layers comprising zig-zag chains, with a magnetic modulation vector of (0.357, 0.103, 0.121) at 3 K but changes to (0.4439, 0, 0.137) at 16 K, while the Co ions in the honeycomb webs form a collinear antiferromagnetic structure. Thermal reduction rate of the Co moments in the honeycomb webs was found to be much smaller than those in the zig-zag chains. Shifting of large amounts of electronic charge into the Co-O bonds in the honeycomb webs on warming is used to understand the behavior.

Original languageEnglish
Pages (from-to)395-402
Number of pages8
JournalJournal of the Chinese Chemical Society
Volume68
Issue number3
DOIs
StatePublished - Mar 2021

Keywords

  • charge redistribution
  • magnetic structure
  • multiferroic
  • neutron diffraction

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