Soft Mode of SrTi^<18>O_<3x>^<16>O_<3(1-x)> Studied by Raman Scattering(Condensed Matter : Electronic Structure, Electrical, Mgagnetic and Optical Properties)
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概要
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A detailed study of ferroelectric microregions (FMRs) of SrTi^<18>O_<3x>^<16>O_<3(1-x)> was carried out for x = 0.21, 0.47 and 0.99. From the analysis of FMR spectra, the soft mode was found in the paraelectric phase even though the present study could not reveal whether its frequency reaches exactly zero or not. The size of an FMR with x = 0.21 becomes larger than those of other species. This result implies that the development of FMRs does not cause the ferroelectric phase transition. It is concluded that the phase transition induced isotopically in SrTiO_3 is of the displacive type.
- 社団法人日本物理学会の論文
- 2002-05-15
著者
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Yagi Toshirou
Research Institute Of Applied Electricity Hokkaido University:department Of Physics Faculty Of Scien
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ITOH Mitsuru
Materials and Structures Laboratory, Tokyo Institute of Technology
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Itoh Mitsuru
Materials & Structures Laboratory Tit
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KASAHARA Masaru
Research Institute of Applied Electricity,Hokkaido University
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Yagi Toshirou
Reseach Institute Of Applied Electricity Hokkaido University
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WANG Ruiping
Smart Structure Center, National Institute of Advanced Industrial Science and Technology
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Wang R
National Inst. Advanced Industrial Sci. And Technol. Ibaraki Jpn
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Yagi Toshirou
Reseach Institute For Electronic Science Hokkaido University
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Masaru Kasahara
Research Institute For Electronic Science Hokkaido University
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Kasahara Masaru
Research Institute For Electronic Science Hokkaido University
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Kasahara Masaru
Reseach Institute For Electronic Science Hokkaido University
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