Distinctive Charge Density Distributions of Perovskite-Type Antiferroelectric Oxides PbZrO3 and PbHfO3 in Cubic Phase
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- Kuroiwa Yoshihiro
- Department of Physics, Okayama University
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- Fujiwara Hiroshi
- Department of Physics, Okayama University
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- Sawada Akikatsu
- Department of Physics, Okayama University
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- Aoyagi Shinobu
- Department of Applied Physics, Nagoya University
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- Nishibori Eiji
- Department of Applied Physics, Nagoya University
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- Sakata Makoto
- Department of Applied Physics, Nagoya University
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- Takata Masaki
- Japan Synchrotron Radiation Research Institute (JASRI)
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- Kawaji Hitoshi
- Materials and Structures Laboratory, Tokyo Institute of Technology
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- Atake Tooru
- Materials and Structures Laboratory, Tokyo Institute of Technology
Bibliographic Information
- Other Title
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- Distinctive Charge Density Distributions of Perovskite-Type Antiferroelectric Oxides PbZrO<sub>3</sub>and PbHfO<sub>3</sub>in Cubic Phase
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Abstract
The electron charge density distributions of simple perovskite oxides, PbBO3 (B = Ti, Zr and Hf), in their cubic phase are investigated by analyzing high-energy synchrotron powder diffraction data by the maximum entropy method (MEM)/Rietveld method. Clear structural differences between the antiferroelectric and ferroelectric perovskites are revealed. In the cubic phase of PbZrO3 and PbHfO3 that undergo antiferroelectric phase transitions, the Pb atom is disordered around the special Wyckoff position. The thermal motion of the O atom is anisotropic, and the charge density distributions around the O atom are extended in the directions perpendicular to the Zr(Hf)-O covalent bond. None of these structural characteristics are observed in the cubic phase of PbTiO3 that undergoes ferroelectric phase transition. The distinctive structural features observed in PbZrO3 and PbHfO3 should provide a clue to the mechanism of antiferroelectric phase transition.
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 43 (9B), 6799-6802, 2004
The Japan Society of Applied Physics
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Details 詳細情報について
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- CRID
- 1390282681242143360
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- NII Article ID
- 10013612639
- 130004532910
- 210000056480
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- NII Book ID
- AA10457675
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- ISSN
- 13474065
- 00214922
- http://id.crossref.org/issn/13474065
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- NDL BIB ID
- 7107105
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed