Electron diffraction and electron microscopic study of BaYCuO superconducting materials

G. Van Tendeloo; H. W. Zandbergen; S. Amelinckx

doi:10.1016/0038-1098(87)91135-5

Electron diffraction and electron microscopic study of BaYCuO superconducting materials

G. Van Tendeloo, H. W. Zandbergen, S. Amelinckx

Research output › peer-review

Abstract

Electron microscopy and electron diffraction have been applied to show that the orthorhombic phase in the compound Ba₂YCu₃O_7-δ is responsible for the high superconducting transition temperature. A positive correlation is found between the volume fration of the orthorhombic phase and the superconducting transition temperature. By means of an "in-situ" heating experiment it is found that the orthorhombic phase is formed on cooling from a high temperature tetragonal phase with disordered vacancies. It is suggested that the low temperature tetragonal phase that occurs in the same specimens as the orthorhombic phase also contains an ordered arrangement of vacancies different from that present in the orthorhombic phase. The order-disorder transition associated with the structural vacancies is shown to be reversible, provided there has been no oxygen loss.

Original language	English
Pages (from-to)	389-393
Number of pages	5
Journal	Solid State Communications
Volume	63
Issue number	5
DOIs	https://doi.org/10.1016/0038-1098(87)91135-5
State	Published - Aug 1987

Funding

This work was performed under the auspices of the Institute for Materials Science of the University of Antwerp in association with SCK/CEN (Mol) and sponsored by I.I.K.W.

Funders	Funder number
University of Antwerp

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/0038-1098(87)91135-5

Cite this

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title = "Electron diffraction and electron microscopic study of BaYCuO superconducting materials",

abstract = "Electron microscopy and electron diffraction have been applied to show that the orthorhombic phase in the compound Ba2YCu3O7-δ is responsible for the high superconducting transition temperature. A positive correlation is found between the volume fration of the orthorhombic phase and the superconducting transition temperature. By means of an {"}in-situ{"} heating experiment it is found that the orthorhombic phase is formed on cooling from a high temperature tetragonal phase with disordered vacancies. It is suggested that the low temperature tetragonal phase that occurs in the same specimens as the orthorhombic phase also contains an ordered arrangement of vacancies different from that present in the orthorhombic phase. The order-disorder transition associated with the structural vacancies is shown to be reversible, provided there has been no oxygen loss.",

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year = "1987",

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T1 - Electron diffraction and electron microscopic study of BaYCuO superconducting materials

AU - Van Tendeloo, G.

AU - Zandbergen, H. W.

AU - Amelinckx, S.

PY - 1987/8

Y1 - 1987/8

N2 - Electron microscopy and electron diffraction have been applied to show that the orthorhombic phase in the compound Ba2YCu3O7-δ is responsible for the high superconducting transition temperature. A positive correlation is found between the volume fration of the orthorhombic phase and the superconducting transition temperature. By means of an "in-situ" heating experiment it is found that the orthorhombic phase is formed on cooling from a high temperature tetragonal phase with disordered vacancies. It is suggested that the low temperature tetragonal phase that occurs in the same specimens as the orthorhombic phase also contains an ordered arrangement of vacancies different from that present in the orthorhombic phase. The order-disorder transition associated with the structural vacancies is shown to be reversible, provided there has been no oxygen loss.

AB - Electron microscopy and electron diffraction have been applied to show that the orthorhombic phase in the compound Ba2YCu3O7-δ is responsible for the high superconducting transition temperature. A positive correlation is found between the volume fration of the orthorhombic phase and the superconducting transition temperature. By means of an "in-situ" heating experiment it is found that the orthorhombic phase is formed on cooling from a high temperature tetragonal phase with disordered vacancies. It is suggested that the low temperature tetragonal phase that occurs in the same specimens as the orthorhombic phase also contains an ordered arrangement of vacancies different from that present in the orthorhombic phase. The order-disorder transition associated with the structural vacancies is shown to be reversible, provided there has been no oxygen loss.

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