Estimation of Critical Current Density in a
Melt-Processed Superconducting Y-Ba-Cu-O Using AC
and DC Inductive Methods
Title, author, abstract
- title
- Estimation of Critical Current Density in a
Melt-Processed Superconducting Y-Ba-Cu-O Using AC
and DC Inductive Methods
- authors
- Edmund Soji Otabe, Nozomu
Ohtani Teruo Matsushita, Yuichi Ishikawa1 and Shuji Yoshizawa1
Department of Computer Science and Electronics,
Kyushu
Institute of Technology, 680--4 Kawazu, Iizuka 820
$^1$Central Research Laboratory, Dowa Mining Co. Ltd.,
277--1 Tobuki, Hachioji, Tokyo 192
- abstract
- The local and transport critical current densities in
a melt-processed Y-Ba-Cu-O were estimated by analyzing the
results of the Campbell method and DC magnetization
measurement in terms of the Campbell model in which the
reversible fluxoid motion is treated. The factor of
overestimation of the local current density was evaluated
from the slope of minor DC magnetization curve. The
obtained local critical current density was about one
order of magnitude larger than the transport critical
current density and was comparable to a
theoretical value
where normal particles of the 211 phase are assumed to act as
dominant pinning centers.
- Original paper appears in
- Jpn. J. Appl. Phys. Vol. 33, No. 7B, pp. L996-L999, 1994