Functional Transition Metal Perovskite Oxides with 6s2Lone Pair Activity Stabilized by High-Pressure Synthesis

Masaki Azuma, Hajime Hojo, Kengo Oka, Hajime Yamamoto, Keisuke Shimizu, Kei Shigematsu, Yuki Sakai

研究成果: Contribution to journalReview article査読


Perovskite ABO3 oxides that have Bi and Pb at the A site and transition metals at the B site, when stabilized by high-pressure synthesis at several gigapascals, provide a rich parameter space of fascinating properties. Stereochemical 6s2 lone pairs of Bi3+ and Pb2+ induce polar or antipolar distortions. 6s2 and 6s0 (Bi5+ and Pb4+) charge degree of freedom enable intermetallic charge transfer transitions. The structural distortion and the charge degree of freedom are coupled with magnetism of transition metals, resulting in various functionalities. In particular, we highlight magnetization reversal by electric field and polarization rotation in BiFe1−xCoxO3, negative thermal expansion in modified BiNiO3 and PbVO3, and systematic charge distribution changes in PbMO3 (M = 3d transition metal).

ジャーナルAnnual Review of Materials Research
出版ステータス出版済み - 7 26 2021

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)


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