TY - JOUR
T1 - Functional Transition Metal Perovskite Oxides with 6s2Lone Pair Activity Stabilized by High-Pressure Synthesis
AU - Azuma, Masaki
AU - Hojo, Hajime
AU - Oka, Kengo
AU - Yamamoto, Hajime
AU - Shimizu, Keisuke
AU - Shigematsu, Kei
AU - Sakai, Yuki
N1 - Funding Information:
This work was partially supported by Grant-in-Aid for Scientific Research JP19H05625 from the Japan Society for the Promotion of Science and by Kanagawa Institute of Industrial Science and Technology. The authors thank Alexei A. Belik and ShogoWakazaki for fruitful discussions
Publisher Copyright:
Copyright © 2021 by Annual Reviews. All rights reserved.
PY - 2021/7/26
Y1 - 2021/7/26
N2 - 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).
AB - 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).
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U2 - 10.1146/annurev-matsci-080819-011831
DO - 10.1146/annurev-matsci-080819-011831
M3 - Review article
AN - SCOPUS:85111429175
SN - 1531-7331
VL - 51
SP - 329
EP - 349
JO - Annual Review of Materials Research
JF - Annual Review of Materials Research
ER -