In-Plane Rotated Crystal Structure in Continuous Growth of Bismuth Cuprate Superconducting Film
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Published:2008-04
Issue:
Volume:139
Page:53-58
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ISSN:1662-9779
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Container-title:Solid State Phenomena
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language:
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Short-container-title:SSP
Author:
Kaneko Satoru1,
Akiyama Kensuke1,
Ito Takeshi1,
Hirabayashi Yasuo1,
Funakubo Hiroshi2,
Yoshimoto Mamoru2
Affiliation:
1. Kanagawa Prefectrual Industrial Technology Center
2. Tokyo Institute of Technology
Abstract
Bismuth cuprate superconductor has a unique structure called a structural modulation
(supercell, SC) consisting of modulated several unit cells. Strain induced by multilayered structure
increases the intensity of SC modulation, while an oxygen deficient sample shows expansion of SC
size. In this study, as opposed to the multilayer strain, by preparing samples with thick film
thicknesses the effect of strain on crystal structure was investigated including SC structure. Epitaxial
growth was verified by x-ray diffraction, and the thicker film showed other epitaxial phase rotated 32°
around the surface normal with respect to the initial epitaxial phase. The SC size estimated by x-ray
reciprocal space mapping was double the size of the initial epitaxial phase. Interestingly, the initial
epitaxial phase became a dominant structure after further deposition. In order to evaluate the different
SC size and SC modulation, a new index related with an incline of the modulation vector was
proposed.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics