Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions
Electronic states in solid-solution transition metal oxides may differ from those in their parent compounds, and this results in interesting electronic properties. In this study, the valence states and electronic properties of solid solutions of (1 − x)PbVO3− xBiCrO3 are reported. The solid solution...
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Online Access: | http://dx.doi.org/10.1080/21870764.2021.1944556 |
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doaj-c496cccfd6bf4e27b8c8da8c4620a33f2021-10-04T13:57:03ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642021-07-01931147115310.1080/21870764.2021.19445561944556Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid SolutionsHajime Yamamoto0Haruna Aizawa1Ikuya Yamada2Kaoru Toda3Atsushi Tanaka4Masaki Azuma5Yuki Sakai6Takumi Nishikubo7Hiroyuki Kimura8Tohoku UniversityTohoku UniversityGraduate School of Engineering, Osaka Prefecture UniversityTohoku UniversityGraduate School of Engineering, Osaka Prefecture UniversityTokyo Institute of TechnologyTokyo Institute of TechnologyTokyo Institute of TechnologyTohoku UniversityElectronic states in solid-solution transition metal oxides may differ from those in their parent compounds, and this results in interesting electronic properties. In this study, the valence states and electronic properties of solid solutions of (1 − x)PbVO3− xBiCrO3 are reported. The solid solutions are successfully synthesized under high-pressure and high-temperature conditions of 5 GPa or 7 GPa and 1273 K, respectively. A change in the crystal structure from centrosymmetric monoclinic (C2/c), as in BiCrO3, to polar tetragonal (P4mm), as in PbVO3, is observed. A tetragonal-to-cubic phase transition, which results in a negative thermal expansion, was observed in 7/8PbVO3-1/8BiCrO3 at approximately 700 K. X-ray absorption spectroscopy and magnetic studies reveal that the Cr and V atoms are in the valence states 3+ and 4+, respectively, which are the same as those of the parent compounds. Thus, it was concluded that the valence state of V4+/Cr3+ and the electron localization in the (1 − x)PbVO3− xBiCrO3 solid solutions are considerably robust.http://dx.doi.org/10.1080/21870764.2021.1944556high-pressure synthesissolid solutionvalence statemagnetism |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hajime Yamamoto Haruna Aizawa Ikuya Yamada Kaoru Toda Atsushi Tanaka Masaki Azuma Yuki Sakai Takumi Nishikubo Hiroyuki Kimura |
spellingShingle |
Hajime Yamamoto Haruna Aizawa Ikuya Yamada Kaoru Toda Atsushi Tanaka Masaki Azuma Yuki Sakai Takumi Nishikubo Hiroyuki Kimura Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions Journal of Asian Ceramic Societies high-pressure synthesis solid solution valence state magnetism |
author_facet |
Hajime Yamamoto Haruna Aizawa Ikuya Yamada Kaoru Toda Atsushi Tanaka Masaki Azuma Yuki Sakai Takumi Nishikubo Hiroyuki Kimura |
author_sort |
Hajime Yamamoto |
title |
Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions |
title_short |
Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions |
title_full |
Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions |
title_fullStr |
Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions |
title_full_unstemmed |
Crystal Structures and Electronic States of High-Pressure-Synthesized (1-x)PbVO3-xBiCrO3 Solid Solutions |
title_sort |
crystal structures and electronic states of high-pressure-synthesized (1-x)pbvo3-xbicro3 solid solutions |
publisher |
Taylor & Francis Group |
series |
Journal of Asian Ceramic Societies |
issn |
2187-0764 |
publishDate |
2021-07-01 |
description |
Electronic states in solid-solution transition metal oxides may differ from those in their parent compounds, and this results in interesting electronic properties. In this study, the valence states and electronic properties of solid solutions of (1 − x)PbVO3− xBiCrO3 are reported. The solid solutions are successfully synthesized under high-pressure and high-temperature conditions of 5 GPa or 7 GPa and 1273 K, respectively. A change in the crystal structure from centrosymmetric monoclinic (C2/c), as in BiCrO3, to polar tetragonal (P4mm), as in PbVO3, is observed. A tetragonal-to-cubic phase transition, which results in a negative thermal expansion, was observed in 7/8PbVO3-1/8BiCrO3 at approximately 700 K. X-ray absorption spectroscopy and magnetic studies reveal that the Cr and V atoms are in the valence states 3+ and 4+, respectively, which are the same as those of the parent compounds. Thus, it was concluded that the valence state of V4+/Cr3+ and the electron localization in the (1 − x)PbVO3− xBiCrO3 solid solutions are considerably robust. |
topic |
high-pressure synthesis solid solution valence state magnetism |
url |
http://dx.doi.org/10.1080/21870764.2021.1944556 |
work_keys_str_mv |
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