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Magnetic hysteresis of p(+) and He-3(2+) irradiated melt-textured YBa2Cu3O(7-delta)We have measured the magnetic hysteresis loops and temperature dependent trapped fields in melt-textured YBa2Cu3O(7-delta) samples before and after p(+) and He-3(2+) irradiation using a Hall effect magnetometer (HEM) as well as a commercial vibrating sample magnetometer (VSM). For proper He-3(2+) fluence, the critical current density may be enhanced by a factor of 10. Calculations based on various critical state models show that before the irradiation, the hysteresis loops can be well accounted for by a critical current density of a modified power law field dependence. After the irradiation, the best fit has been achieved by using an exponential form. Jc and its field dependence deduced from HEM hysteresis loops are in good agreement with those deduced from the VSM loops, suggesting that the Hall effect magnetometer can be conveniently used to characterize bulk high Tc oxide superconductors.
Document ID
19930032388
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Song, S. N.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Liu, J.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Chen, I. G.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Weinstein, Roy
(Houston Univ. TX, United States)
Date Acquired
August 15, 2013
Publication Date
November 1, 1992
Publication Information
Publication: Journal of Applied Physics
Volume: 72
Issue: 9
ISSN: 0021-8979
Subject Category
Solid-State Physics
Accession Number
93A16385
Distribution Limits
Public
Copyright
Other

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