Vortex dynamics in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}-thin films in the presence of columnar defects
- Johannes Gutenberg Universitaet, Staudinger (Germany); and others
With heavy ion irradiation the authors create continuous amorphous columnar defects in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}-thin films. With regard to a reliable comparison of irradiation effects three of four identical striplines on the same samples were exposed to different irradiation procedures. The authors performed irradiations as well parallel as under different angles with respect to the film c-axis. Beside an enlarged normal state resistivity after irradiation the films suffer a T{sub c}-reduction proportional to the volume of the damaged material. The activation energy ascertained from resistive transitions shows best enhancement for magnetic field values close to the matching field. Measurements of the transport critical current density, the activation energy and the irreversibility field in different field orientations show no anisotropic flux pinning due to the induced columnar defects. This can be explained by the two dimensional behavior of the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}-thin films.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443640
- Report Number(s):
- CONF-960808--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
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