A-Site Columnar-Ordered Perovskite CaZnV2O6 as a Pauli-Paramagnetic Metal

Masayuki Fukuda; Takumi Nishikubo; Hongwu Yu; Yoichi Okimoto; Shin-Ya Koshihara; Kazunari Yamaura; Masaki Azuma

doi:10.1021/acs.inorgchem.3c00940

A-Site Columnar-Ordered Perovskite CaZnV₂O₆ as a Pauli-Paramagnetic Metal

Inorg Chem. 2023 May 29;62(21):8372-8378. doi: 10.1021/acs.inorgchem.3c00940. Epub 2023 May 16.

Authors

Masayuki Fukuda^{1

2}, Takumi Nishikubo^{1

3}, Hongwu Yu⁴, Yoichi Okimoto⁴, Shin-Ya Koshihara⁴, Kazunari Yamaura^{2

5}, Masaki Azuma^{1

3}

Affiliations

¹ Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.
² Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
³ Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan.
⁴ Department of Chemistry, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
⁵ Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 10 West 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.

PMID: 37192407
DOI: 10.1021/acs.inorgchem.3c00940

Abstract

In this study, we successfully synthesized a novel A-site columnar-ordered perovskite CaZnV₂O₆. This compound features a square-planar-coordinated Zn²⁺ disorder, which is the same characteristic as the centrosymmetric paraelectric CaMnTi₂O₆. Unlike CaMnTi₂O₆, which shows a centrosymmetric paraelectric-noncentrosymmetric ferroelectric transition, CaZnV₂O₆ retains Pauli-paramagnetic metallicity arising from itinerant V⁴⁺ d¹ electrons and centrosymmetry down to 5 K. Based on analogous compounds, we expect CaZnV₂O₆ to provide a new playground for the electronic and magnetic states of V⁴⁺.