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We have successfully synthesized two new half-doped perovskites, MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3, with unique small Mn2+ cations at the A site under high-temperature and high-pressure conditions (6 GPa and 900-1300 °C). Synchrotron X-ray structure analysis confirmed their crystal structures to belong to the space group Pnma, and they do not exhibit features of an ordered perovskite (double perovskite) structure. Magnetic property measurements revealed an essentially antiferromagnetic nature below 17 K and 18 K for both compounds, respectively, accompanied by a small contribution of thermal and magnetic field hysteresis. Electrical conductivity measurements showed activation energies of 0.13 eV and 0.31 eV, respectively, suggesting semiconductor-like behavior. These findings underscore the potential of these materials with unusual A-site small Mn2+ cations for electronic and magnetic devices, warranting further studies to explore their unique magnetic and electronic properties.

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• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

  This is an Accepted Manuscript version of the following article, accepted for publication in High Pressure Research. Xun Kang, Hiroaki Hayashi, Alexei A. Belik, Yoshihiro Tsujimoto & Kazunari Yamaura. (2023) High-pressure synthesis of half-doped perovskites MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3 with unusual A-site small Mn2+ cations. HIGH PRESSURE RESEARCH. https://doi.org/10.1080/08957959.2023.2283543. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.1/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keyword: Perovskites, MnVO3, High-pressure synthesis

Date published: 2024-01-02

Publisher: Taylor & Francis

Journal:

• HIGH PRESSURE RESEARCH (ISSN: 14772299)

Funding:

• Japan Society for the Promotion of Science JP20H05276 (Grant-in-Aid for Scientific Research)
• Japan Society for the Promotion of Science JP22H04601 (Grant-in-Aid for Scientific Research)
• Kazuchika Okura Memorial Foundation 2022-11

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4297

First published URL: https://doi.org/10.1080/08957959.2023.2283543

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Updated at: 2024-11-21 16:30:51 +0900

Published on MDR: 2024-11-21 16:30:51 +0900