K2Co2TeO6: A layered magnet with a S= 12 Co2+ honeycomb lattice

Xianghan Xu, Lijun Wu, Yimei Zhu, R. J. Cava

Research output: Contribution to journalArticlepeer-review


Recent observations of Kitaev interactions in d7 electron configurations have generated research interest in Co2+ based honeycomb magnets. Here, we report the synthesis of a K2Co2TeO6 single crystal. X-ray diffraction and electron microscopy experiments show that K2Co2TeO6 crystallizes in a P63/mcm space group with undistorted honeycomb layers of Co2+ ions. Anisotropic magnetic and thermodynamic characterizations demonstrate an effective S=12 state of Co2+ at low temperature, competing magnetic phases, and weak magnetic transitions that can be suppressed by applying fields. The interlayer K disorder level is found to be tunable by thermal treatments, and it plays detectable effects on magnetic behaviors. Our discoveries offer a promising platform for exploring intricate frustrated magnetism, intertwined structural orderings, and Kitaev interactions.

Original languageEnglish (US)
Article number174432
JournalPhysical Review B
Issue number17
StatePublished - Nov 1 2023

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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