Composite Structure of BaTiO_3 Nanoparticle Investigated by SR X-Ray Diffraction(Condensed Matter : Electronic Structure, Electrical, Mgagnetic and Optical Properties)
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概要
- 論文の詳細を見る
The size effects on the crystal structure and phase transitions have been investigated for BaTiO_3 fine particles of 700, 400, 300 and 100 nm size, by means of powder diffraction using synchrotron radiation (SR) high-energy X-rays. The Rietveld refinement reveals that the BaTiO_3 fine particles consist of tetragonal and cubic structure components at 300 K. The structure model indicating that the cubic BaTiO_3 shell covers the tetragonal BaTiO_3 core is examined. The thickness of the cubic shell is estimated at approximately 8 nm, which is almost constant irrespective of particle sizes, and the volume ratio of the cubic component increases with decreasing the particle size. Successive phase transitions are detected even in 100 nm size particles, where only the tetragonal component undergoes the phase transition.
- 社団法人日本物理学会の論文
- 2002-05-15
著者
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澤田 昭勝
岡山大理
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ATAKE Tooru
Materials and Structures Laboratory, Tokyo Institute of Technology
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Yamashita Isao
Materials And Structures Laboratory Tokyo Institute Of Technology
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Adachi T
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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KUROIWA Yoshihiro
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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AOYAGI Shinobu
Japan Synchrotron Radiation Research Institute (JASRI)
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Aoyagi S
Department Of Applied Physics Nagoya University
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Sawada A
Muroran Inst. Technology Muroran
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Sakai A
Muroran Inst. Technol. Muroran
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Aoyagi Shinobu
Department Of Applied Physics Nagoya University
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Atake Tooru
Materials And Structure Laboratory Tokyo Institute Of Technology
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Kuroiwa Yoshihiro
Department Of Physice Faculty Of Science Okayama University
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Sawada Akikatsu
Department Of Applied Physics Faculty Of Engineering Nagoya University:(present Address)synthetic Cr
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Adachi T
Materials And Structures Laboratory Tokyo Institute Of Technology
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Yamashita Isao
Materials And Structures Lab. Tokyo Institute Of Technology
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KUROIWA Yoshihiro
Department of Physical Science, Hiroshima University
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