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Relationship between critical current properties and nanorod morphology in REBa2Cu3Oy thin films

Published online by Cambridge University Press:  11 December 2012

M. Haruta ,
N. Fujita ,
Y. Ogura ,
T. Nakata ,
T. Maeda ,
A. Ichinose ,
P. Mele ,
K. Matsumoto  and
S. Horii
M. Haruta
Affiliation:
School of Environmental Science and Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
N. Fujita
Affiliation:
School of Environmental Science and Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
Y. Ogura
Affiliation:
School of Environmental Science and Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
T. Nakata
Affiliation:
School of Environmental Science and Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
T. Maeda
Affiliation:
School of Environmental Science and Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
A. Ichinose
Affiliation:
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa 240-0196, Japan
P. Mele
Affiliation:
Institute for Sustainable Science and Development, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8530, Japan
K. Matsumoto
Affiliation:
Department of Materials Science and Engineering, Kyushu Institute of Technology, Tobata-ku, Kitakyushu 804-8550, Japan
S. Horii
Affiliation:
School of Environmental Science and Engineering, Kochi University of Technology, Kami-shi, Kochi 782-8502, Japan
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Abstract

Changes in critical current properties depending on growth temperature (Ts) were clarified for Ba-Nb-O-doped YBa2Cu3Oy (Y123) films deposited by YAG- and excimer-PLD. Due to the introduction of Ba-Nb-O-nanorods, a vortex-Bose-glass-like behavior emerged as irreversibility lines and in-field critical current densities (Jcs) were improved. Crossover magnetic fields (Bcr) and in-field Jcs increased with the increase in Ts for the Y123 films with nanorods. These Ts-dependent critical current properties were attributable to the changes in morphology of the nanorods with Ts and were independent of laser source in PLD apparatuses. For the fabrication of RE123 coated conductors containing nanorods, optimization of Ts with taking both materials of RE123 matrix and nanorod into account is necessary to achieve higher in-field Jc.

Keywords

superconductingphysical vapor deposition (PVD)microstructure
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-i05-02
Copyright
Copyright © Materials Research Society 2012

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