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Melting of dxy Orbital Ordering Accompanied by Suppression of Giant Tetragonal Distortion and Insulator-to-Metal Transition in Cr- Substituted PbVO3

Ogata, Takahiro ; Sakai, Yuki ; Yamamoto, Hajime ; Patel, Satyanarayan ; Keil, Peter ; Koruza, Jurij ; Kawaguchi, Shogo ; Pan, Zhao ; Nishikubo, Takumi ; Rödel, Jürgen ; Azuma, Masaki (2019):
Melting of dxy Orbital Ordering Accompanied by Suppression of Giant Tetragonal Distortion and Insulator-to-Metal Transition in Cr- Substituted PbVO3.
In: Chemistry of Materials, 2019 (31), pp. 1352-1358. American Chemical Society, ISSN 0897-4756,
DOI: 10.1021/acs.chemmater.8b04680,
[Article]

Abstract

PbVO3 features giant tetragonal distortion (c/a = 1.23) and spontaneous polarization (Ps = 101 μC/cm2) originating from the ordering of dxy orbital of V4+ with single d electrons. A dedicated study of Cr-substituted PbVO3 prepared by high-pressure synthesis afforded a well-defined variation in c/a ratio. Ensuing changes in atomic structure were correlated to ferroelastic domain switching and a temperature-induced structural transition to a cubic phase accompanied with an insulator-to-metal transition and a negative thermal expansion.

Item Type: Article
Erschienen: 2019
Creators: Ogata, Takahiro ; Sakai, Yuki ; Yamamoto, Hajime ; Patel, Satyanarayan ; Keil, Peter ; Koruza, Jurij ; Kawaguchi, Shogo ; Pan, Zhao ; Nishikubo, Takumi ; Rödel, Jürgen ; Azuma, Masaki
Title: Melting of dxy Orbital Ordering Accompanied by Suppression of Giant Tetragonal Distortion and Insulator-to-Metal Transition in Cr- Substituted PbVO3
Language: English
Abstract:

PbVO3 features giant tetragonal distortion (c/a = 1.23) and spontaneous polarization (Ps = 101 μC/cm2) originating from the ordering of dxy orbital of V4+ with single d electrons. A dedicated study of Cr-substituted PbVO3 prepared by high-pressure synthesis afforded a well-defined variation in c/a ratio. Ensuing changes in atomic structure were correlated to ferroelastic domain switching and a temperature-induced structural transition to a cubic phase accompanied with an insulator-to-metal transition and a negative thermal expansion.

Journal or Publication Title: Chemistry of Materials
Journal volume: 2019
Number: 31
Publisher: American Chemical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 04 Mar 2019 13:08
DOI: 10.1021/acs.chemmater.8b04680
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