High-pressure synthesis, crystal structure, and magnetic properties of Ba<sub>3</sub>CuOs<sub>2</sub>O<sub>9</sub>

POSTER

Abstract

The triple perovskite Ba3CuOs2O9 crystalizes into an orthorhombic structure (Cmcm ) and shows a manifest antiferromagnetic transition at 47 K [1], while it crystalizes into a hexagonal structure (P63/mmc) when treated under a high-pressure and high-temperature condition (typically 6 GPa and 1100 ○C). The change of structure gains a 1.3% increase in structural density. The hexagonal phase was quenched at ambient condition and the magnetic and electrical properties were investigated via measurements of the ac and dc magnetic susceptibilities, electrical resistivity, and specific heat capacity. The data indicated that the magnetic transition temperature increased to 290 K by the structure change. We discuss details of the magnetic and electrical properties of the newly synthesized hexagonal Ba3CuOs2O9.

[1] H. L. Feng and M. Jansen J Solid State Chem. 258, 776 (2018).

Presenters

  • Jie Chen

    • National Institute for Materials Science

Authors

  • Jie Chen

    • National Institute for Materials Science

  • Hai Luke Feng

    • Max Planck Institute for Chemical Physics of Solids

  • Yoshitaka Matsushita

    • National Institute for Materials Science

  • Alexei A Belik

    • National Institute for Materials Science

  • Yoshihiro Tsujimoto

    • National Institute for Materials Science

  • Yoshio Katsuya

    • National Institute for Materials Science

  • Masahiko Tanaka

    • National Institute for Materials Science

  • Man-Rong Li

    • School of Chemistry, Sun Yat-sen University

  • Hongbin Liang

    • School of Chemistry, Sun Yat-sen University

  • Lirong Zheng

    • Institute of High Energy Physics, Chinese Academy of Sciences

  • Kazunari Yamaura

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science
    • Superconducting Properties unit, National Institute for Materials Science