High-pressure synthesis of half-doped perovskites MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3 with unusual A-site small Mn2+ cations

被引：0

作者：

Kang, Xun ^{[1
,2
]}

Hayashi, Hiroaki ^{[1
,2
]}

Belik, Alexei A. ^{[1
]}

Tsujimoto, Yoshihiro ^{[1
,2
]}

Yamaura, Kazunari ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Res Ctr Mat Nanoarchitecton MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[2] Hokkaido Univ, Grad Sch Chem Sci & Engn, North 10 West 8, Kita Ku, Sapporo, Hokkaido 0600810, Japan

来源：

HIGH PRESSURE RESEARCH | 2024年 / 44卷 / 01期

基金：

日本学术振兴会;

关键词：

Perovskites; MnVO3; MnV0.5Nb0.5O3; MnV0.5Ta0.5O3; synchrotron XRD; high-pressure synthesis; MULTIFERROIC PROPERTIES; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; FERROELECTRICITY; SUPERCONDUCTIVITY; MAGNETORESISTANCE; TRANSITION; ORIGIN; CHARGE; SPIN;

D O I：

10.1080/08957959.2023.2283543

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 degrees 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 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 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.

引用

页码：25 / 37

页数：13