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Biaxial alignment of high-Tc superconductor polycrystals VIII: Phi-circle scan analysis of EuBa2Cu3O7−δ (Eu-123)

Published online by Cambridge University Press:  31 January 2011

Sheng-Qi Wang ,
Roberta A. Bigelow ,
Jian-Zhong Zhang ,
Carlos Bonetto ,
Bala Maheswaran ,
Robert S. Markiewicz ,
Mary G. Williams  and
Bill C. Giessen
Sheng-Qi Wang
Affiliation:
Department of Chemistry and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
Roberta A. Bigelow
Affiliation:
Department of Physics and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
Jian-Zhong Zhang
Affiliation:
Department of Physics and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
Carlos Bonetto
Affiliation:
Department of Physics and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
Bala Maheswaran
Affiliation:
Department of Physics and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
Robert S. Markiewicz
Affiliation:
Department of Physics and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
Mary G. Williams
Affiliation:
Department of Mechanical Engineering, Northeastern University, Boston, Massachusetts 02115
Bill C. Giessen
Affiliation:
Departments of Chemistry, Mechanical Engineering, and Barnett Institute, Northeastern University, Boston, Massachusetts 02115
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Abstract

To reduce grain boundary weak links due to large-angle grain orientation mismatch, bulk (thick film) EuBa2Cu3O7−δ high-Tc superconductor specimens were biaxially aligned by a mechanical force such that their [001] axes were perpendicular to the specimen surfaces and by a magnetic force so as to orient their [010] axes to lie parallel to the magnetic field direction in the specimen plane. We describe here the characterization of such EuBa2Cu3O7−δ thick films by φ-circle XRD scans of (013) reflections, demonstrating a high degree (33%) of c-axis alignment with FWHM of <5° and approximately Gaussian distributions of a, b-axis alignment with a FWHM of 47°. The formation of “granular single crystals”, toward which this work is a further advance, can be seen as establishing a new paradigm in ceramics science.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 5 , May 1996 , pp. 1108 - 1113
Copyright
Copyright © Materials Research Society 1996

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References

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