Functional Transition Metal Perovskite Oxides with 6s2 Lone Pair Activity Stabilized by High-Pressure Synthesis
| Autor: | Keisuke Shimizu, Hajime Hojo, Kengo Oka, Kei Shigematsu, Hajime Yamamoto, Yuki Sakai, Masaki Azuma |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
02 engineering and technology Parameter space 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystallography Polarization density Transition metal Negative thermal expansion High pressure General Materials Science Multiferroics 0210 nano-technology Lone pair Perovskite (structure) |
| Zdroj: | Annual Review of Materials Research. 51:329-349 |
| ISSN: | 1545-4118 1531-7331 |
| Popis: | 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 6 s2 lone pairs of Bi3+ and Pb2+ induce polar or antipolar distortions. 6 s2 and 6 s0 (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− xCo xO3, negative thermal expansion in modified BiNiO3 and PbVO3, and systematic charge distribution changes in Pb MO3 ( M = 3 d transition metal). |
| Databáze: | OpenAIRE |
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