Kyushu Institute of Technology Academic Repository
Kyutacarは九州工業大学で生産された研究成果を オープンアクセスで提供する機関リポジトリシステムです。 Kyutacar is open-access repository of research by members of the Kyushu Institute of Technology.
Department of Materials Science and Engineering, Kyushu Institute of Technology
Department of Materials Science and Engineering, Kyushu Institute of Technology
Department of Materials Science and Engineering, Kyushu Institute of Technology
Department of Materials Science and Engineering, University of Utah/ Research Center for Environmentally Friendly Materials Engineering, Muroran Institute of Technology
Research Center for Environmentally Friendly Materials Engineering, Muroran Institute of Technology
Central Research Institute of Electrical Power Industry
Department of Energy Engineering and Science, Nagoya University
Institute for Materials Research, Tohoku University
抄録
The effect of incorporation of nanoscale Y2BaCuO5 (Y211) inclusions on the vortex pinning properties of YBa2Cu3O7-δ (YBCO or Y123) superconducting thin films is investigated in detail on the basis of variation of critical current density (JC) with applied magnetic field and also with the orientation of the applied magnetic field at two different temperatures: 77 K and 65 K. Surface modified target approach is employed to incorporate nanoscale Y211 inclusions into the superconducting YBCO matrix. The efficiency of Y211 nanoinclusions in reducing the angular anisotropy of critical current density is found to be significant. The observed angular dependence of the critical current density is discussed on the basis of mutually occupied volume by a vortex and spherical and/or planar defect. A dip in JC near the ab-plane is also observed which has been analyzed on the basis of variation of pinning potential corresponding to a spherical (3-D) or planar (2-D) pinning center and has been attributed to a reduced interaction volume of the vortices with a pinning center and competing nature of the potentials due to spherical and planar defects.
雑誌名
Journal of Applied Physics
巻
122
号
9
ページ
093905
発行年
2017-09-07
出版者
AIP Publishing
ISSN
0021-8979
1089-7550
書誌レコードID
AA00693547
DOI
http://dx.doi.org/10.1063/1.5001273
権利
Copyright (c) 2017 Author(s). The following article has been submitted to/accepted by Journal of Applied Physics. After it is published, it will be found at https://aip.scitation.org/doi/10.1063/1.5001273.
Isotropic enhancement in the critical current density of YBCO thin films incorporating nanoscale Y2BaCuO5 inclusions
scunit-2017_12.pdf
(3.47MB)
