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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 and Sakai, Yuki and Yamamoto, Hajime and Patel, Satyanarayan and Keil, Peter and Koruza, Jurij and Kawaguchi, Shogo and Pan, Zhao and Nishikubo, Takumi and Rödel, Jürgen and 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, American Chemical Society, pp. 1352-1358, 2019, (31), 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 and Sakai, Yuki and Yamamoto, Hajime and Patel, Satyanarayan and Keil, Peter and Koruza, Jurij and Kawaguchi, Shogo and Pan, Zhao and Nishikubo, Takumi and Rödel, Jürgen and 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
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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