Heavy atom disorder in the high Tc superconductor Ba2YCu3O7-δ studied by means of electron microscopy and electron diffraction

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

doi:10.1016/0038-1098(87)90641-7

Heavy atom disorder in the high T_c superconductor Ba₂YCu₃O_7-δ studied by means of electron microscopy and electron diffraction

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

Research output › peer-review

Abstract

It is shown that on rapid cooling of the compound Ba₂YCu₃O_7-δ one obtains a highly disordered material in which the perovskite framework is conserved but in which barium and yttrium atoms exhibit a high degree of disorder. This leads to lattice deformations, which can be visualized in the electron microscope. The electron diffraction patterns also reveal the disorder. As-quenched specimens are no longer high T_c superconductors, but the superconducting properties can be recovered by an adequate heat treatment whereby the vacancies become ordered.

Original language	English
Pages (from-to)	969-972
Number of pages	4
Journal	Solid State Communications
Volume	63
Issue number	11
DOIs	https://doi.org/10.1016/0038-1098(87)90641-7
State	Published - Sep 1987

Funding

Acknowledgements The authors wish to thank Dr.A. Van den Bosch (SCK~CEN), Dr.H. Van den Berg and Dr.Kes (Leiden) for measuring the transition temperatures of the different samples. Thanks are due to Mr.Ooms and Gilissen for the preparation of specimens. This work was performed under the auspices of the Institute for Materials Science of the University of Antwerp in association with SCK/CEN (Mel) and sponsored by IIKW.

Funders	Funder number
University of Antwerp

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(87)90641-7

Cite this

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abstract = "It is shown that on rapid cooling of the compound Ba2YCu3O7-δ one obtains a highly disordered material in which the perovskite framework is conserved but in which barium and yttrium atoms exhibit a high degree of disorder. This leads to lattice deformations, which can be visualized in the electron microscope. The electron diffraction patterns also reveal the disorder. As-quenched specimens are no longer high Tc superconductors, but the superconducting properties can be recovered by an adequate heat treatment whereby the vacancies become ordered.",

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AU - Amelinckx, S.

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AB - It is shown that on rapid cooling of the compound Ba2YCu3O7-δ one obtains a highly disordered material in which the perovskite framework is conserved but in which barium and yttrium atoms exhibit a high degree of disorder. This leads to lattice deformations, which can be visualized in the electron microscope. The electron diffraction patterns also reveal the disorder. As-quenched specimens are no longer high Tc superconductors, but the superconducting properties can be recovered by an adequate heat treatment whereby the vacancies become ordered.

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