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ID 46734
file
creator
Yamaguchi, Tetsuji
Iguchi, Ienari
subject
Scanning SQUID Microscope
Current Distribution
Vortex
HTSC
NDC
Physics
abstract
Scanning SQUID Microscope (SSM) is a powerful tool for observing small magnetic flux. It measures the z-component signal of flux density, but it is also available for observation of current distribution by inverting the Biot-Savart law. We report the two dimensional (2D) vector mapping of current distributions in high-TC superconducting YBa2Cu3O7−y (YBCO) thin films obtained by converting magnetic-field data measured by SSM. The current distribution contains those from both transport supercurrent and vortex current. The transport supercurrent is found to flow mainly along the edge of a stripline. The results are in good qualitative agreement with the calculated results based on simple London model. The YBCO films with an artificial grain boundary, i.e. Josephson boundary are also observed. The transport current seems to flows with avoiding the vortices, and an irregular vortex is observed at a point of grain boundary.
journal title
Physica C: Superconductivity
volume
Volume 357-360
start page
1473
end page
1477
date of issued
2001-08
publisher
Elsevier Science B.V.
issn
0921-4534
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2001 Elsevier Science B.V.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
relation url
department
Graduate School of Integrated Arts and Sciences