TY - JOUR
T1 - Emergence of a cubic phase stabilized by intermetallic charge transfer in (1-x)PbVO3- xBiCoO3solid solutions
AU - Yamamoto, Hajime
AU - Toda, Kaoru
AU - Sakai, Yuki
AU - Nishikubo, Takumi
AU - Yamada, Ikuya
AU - Shigematsu, Kei
AU - Azuma, Masaki
AU - Sagayama, Hajime
AU - Mizumaki, Masaichiro
AU - Nitta, Kiyofumi
AU - Kimura, Hiroyuki
N1 - Funding Information:
The authors thank Dr. Yusuke Tamenori for his support with the XAS measurements and Dr. Daisuke Morikawa for fruitful discussions. This work was partially supported by the Grant-in-Aid for Scientific Research 19K15280 and 19H05625 from the Japan Society for the Promotion of Science (JSPS), the Asahi Glass Foundation, Tokuyama Science Foundation and the Collaborative Research Projects of the Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology. The SXRD experiments were performed under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2018G603). The synchrotron-radiation XAS experiments were performed at SPring-8 with the approval of Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2020A1324).
Funding Information:
The authors thank Dr. Yusuke Tamenori for his support with the XAS measurements and Dr. Daisuke Morikawa for fruitful discussions. This work was partially supported by the Grant-in-Aid for Scientific Research 19K15280 and 19H05625 from the Japan Society for the Promotion of Science (JSPS), the Asahi Glass Foundation, Tokuyama Science Foundation, and the Collaborative Research Projects of the Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology. The SXRD experiments were performed under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2018G603). The synchrotron-radiation XAS experiments were performed at SPring-8 with the approval of Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2020A1324).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/8/25
Y1 - 2020/8/25
N2 - In this study, the crystal structure evolution of solid solutions between giant-tetragonal (GT) perovskite-type PbVO3 and BiCoO3, namely, (1 - x)PbVO3-xBiCoO3, is reported. The all-proportional solid solutions are successfully synthesized using a high-pressure and high-temperature method. A region of cubic phase is observed in the 0.4 ≤ x ≤ 0.75 range. The tetragonal distortion (c/a ratio) systematically decreases toward the cubic phase region, and these phases coexist in boundary regions. Magnetic susceptibility and soft X-ray absorption spectroscopy measurements reveal that 0.5PbVO3-0.5BiCoO3 possesses a valence state of V5+ and Co2+, which is different from the end members, V4+ and Co3+. The crystal structure changes stem from a self-doping effect induced by intermetallic charge transfer between the V and Co ions on the B-site (V4+ + Co3+ → V5+ + Co2+). This finding shows that tuning an electronic structure by making a solid solution is an effective way to control the stability of the GT structure.
AB - In this study, the crystal structure evolution of solid solutions between giant-tetragonal (GT) perovskite-type PbVO3 and BiCoO3, namely, (1 - x)PbVO3-xBiCoO3, is reported. The all-proportional solid solutions are successfully synthesized using a high-pressure and high-temperature method. A region of cubic phase is observed in the 0.4 ≤ x ≤ 0.75 range. The tetragonal distortion (c/a ratio) systematically decreases toward the cubic phase region, and these phases coexist in boundary regions. Magnetic susceptibility and soft X-ray absorption spectroscopy measurements reveal that 0.5PbVO3-0.5BiCoO3 possesses a valence state of V5+ and Co2+, which is different from the end members, V4+ and Co3+. The crystal structure changes stem from a self-doping effect induced by intermetallic charge transfer between the V and Co ions on the B-site (V4+ + Co3+ → V5+ + Co2+). This finding shows that tuning an electronic structure by making a solid solution is an effective way to control the stability of the GT structure.
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U2 - 10.1021/acs.chemmater.0c01934
DO - 10.1021/acs.chemmater.0c01934
M3 - Article
AN - SCOPUS:85092040787
VL - 32
SP - 6892
EP - 6897
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 16
ER -