Structure analysis of high-tcsuperconductor bi-ca-sr-cu-o by processing of high-resolution electron microscope images

Daisuke Shindo; Kenji Hiraga; Makoto Hirabayashi; Masae Kikuchi; Yasuhiko Syono

doi:10.1143/JJAP.27.L1018

Structure analysis of high-t_csuperconductor bi-ca-sr-cu-o by processing of high-resolution electron microscope images

Daisuke Shindo, Kenji Hiraga, Makoto Hirabayashi, Masae Kikuchi, Yasuhiko Syono

Center for Advanced Microscopy and Spectroscopy

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

A modulated structure in Bi-Ca-Sr-Cu-O was analyzed by image processing of high-resolution electron micrographs. The contrast of the modulated structure along the [010] direction with about 5a period was strongly enhanced by the processing. The structural modulation, mainly caused by the displacements of Bi atoms due to oxygen vacancies in the Bi₄>Ti₃>O₁₂>derivative structure was clearly revealed. By combining the above result with processed images in other orientations, a realistic model of the modulated structure is proposed. It is demonstrated that the processing of high resolution images is useful in analyzing the complicated modulated structures such as observed in the new high-T_c>superconductor Bi-Ca-Sr-Cu-O.

Original language	English
Pages (from-to)	L1018-L1021
Journal	Japanese journal of applied physics
Volume	27
Issue number	6A
DOIs	https://doi.org/10.1143/JJAP.27.L1018
Publication status	Published - 1988 Jun

Keywords

Bi-Ca-Sr-Cu-O
High-Tc superconductor
High-resolution electron microscopy
Image processing
Incommensurate structure
Oxygen vacancy

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Structure analysis of high-tcsuperconductor bi-ca-sr-cu-o by processing of high-resolution electron microscope images",

abstract = "A modulated structure in Bi-Ca-Sr-Cu-O was analyzed by image processing of high-resolution electron micrographs. The contrast of the modulated structure along the [010] direction with about 5a period was strongly enhanced by the processing. The structural modulation, mainly caused by the displacements of Bi atoms due to oxygen vacancies in the Bi4>Ti3>O12>derivative structure was clearly revealed. By combining the above result with processed images in other orientations, a realistic model of the modulated structure is proposed. It is demonstrated that the processing of high resolution images is useful in analyzing the complicated modulated structures such as observed in the new high-Tc>superconductor Bi-Ca-Sr-Cu-O.",

keywords = "Bi-Ca-Sr-Cu-O, High-Tc superconductor, High-resolution electron microscopy, Image processing, Incommensurate structure, Oxygen vacancy",

author = "Daisuke Shindo and Kenji Hiraga and Makoto Hirabayashi and Masae Kikuchi and Yasuhiko Syono",

year = "1988",

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doi = "10.1143/JJAP.27.L1018",

language = "English",

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AU - Shindo, Daisuke

AU - Hiraga, Kenji

AU - Hirabayashi, Makoto

AU - Kikuchi, Masae

AU - Syono, Yasuhiko

PY - 1988/6

Y1 - 1988/6

N2 - A modulated structure in Bi-Ca-Sr-Cu-O was analyzed by image processing of high-resolution electron micrographs. The contrast of the modulated structure along the [010] direction with about 5a period was strongly enhanced by the processing. The structural modulation, mainly caused by the displacements of Bi atoms due to oxygen vacancies in the Bi4>Ti3>O12>derivative structure was clearly revealed. By combining the above result with processed images in other orientations, a realistic model of the modulated structure is proposed. It is demonstrated that the processing of high resolution images is useful in analyzing the complicated modulated structures such as observed in the new high-Tc>superconductor Bi-Ca-Sr-Cu-O.

AB - A modulated structure in Bi-Ca-Sr-Cu-O was analyzed by image processing of high-resolution electron micrographs. The contrast of the modulated structure along the [010] direction with about 5a period was strongly enhanced by the processing. The structural modulation, mainly caused by the displacements of Bi atoms due to oxygen vacancies in the Bi4>Ti3>O12>derivative structure was clearly revealed. By combining the above result with processed images in other orientations, a realistic model of the modulated structure is proposed. It is demonstrated that the processing of high resolution images is useful in analyzing the complicated modulated structures such as observed in the new high-Tc>superconductor Bi-Ca-Sr-Cu-O.

KW - Bi-Ca-Sr-Cu-O

KW - High-Tc superconductor

KW - High-resolution electron microscopy

KW - Image processing

KW - Incommensurate structure

KW - Oxygen vacancy

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