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Relationship between grain size and the degrees of orientation in a twinned ErBa2Cu3Oy superconductor oriented in modulated rotating magnetic fields

Published online by Cambridge University Press:  25 July 2013

Shigeru Horii ,
Shota Okuhira ,
Momoko Yamaki ,
Masakazu Haruta  and
Jun-ichi Shimoyama
Shigeru Horii
Affiliation:
Department of Environmental Systems Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
Shota Okuhira
Affiliation:
Department of Environmental Systems Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
Momoko Yamaki
Affiliation:
Department of Environmental Systems Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
Masakazu Haruta
Affiliation:
Department of Environmental Systems Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
Jun-ichi Shimoyama
Affiliation:
Depatment of Applied Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan
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Abstract

We report the dependences of the degrees of tri- or bi-axial orientation on strength of applied magnetic fields of modulated rotating field (MRF) for twinned ErBa2Cu3Oy (Er123) powder samples oriented in epoxy resin under various MRF conditions. Introduction of a pulverization process in the Er123 powders improved the degrees of inplane orientations, and is effective for enhancing the inplane magnetic anisotropy of Er123 grains with twin microstructure. Formation of inhomogeneous domain structure is a dominant factor of the enhancement, and the present study indicates possibility of tri- or bi-axial orientation of the twinned Er123 grains even under relatively low MRF conditions around 1 T.

Keywords

superconductingmicrostructuremagnetic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1434: Symposium I – Recent Advances in Superconductors, Novel Compounds and High-Tc Materials , 2013 , mrss12-1434-i05-08
Copyright
Copyright © Materials Research Society 2013 

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References

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