Structures in superconducting YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} thin films investigated by magneto-optic technique
- Universitaet Konstanz (Germany); and others
Using a reflection magneto-optic technique the authors have investigated natural inhomogeneities and artificial structures in YBCO thin films exposed to an external magnetic field. The artificial structures were mechanically scratched by scanning a diamond tip with different loading over the film surface. Alternatively planar structures with reduced oxygen content could be patterned by heating the YBCO film with a focused laser beam in nitrogen atmosphere. Depending on the laser annealing parameters different screening properties concerning the applied magnetic field could be achieved. As a magneto-optically active layer the authors used EuS films evaporated on glass as well as bismuth- and gallium-doped lutetium-iron-garnet films grown onto (111) oriented gadolinium-gallium-garnet substrates by liquid phase epitaxy. In contrast to measurements with EuS films that show only weak faraday rotation for temperatures higher than 20 K the magneto-optic studies have been expanded to about 60 K by using the garnet films.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443635
- Report Number(s):
- CONF-960808-; ISSN 0022-2291; TRN: 97:000865-0008
- Journal Information:
- Journal of Low Temperature Physics, Vol. 105, Issue 5-6; Conference: 3. international conference on physics and chemistry of molecular and oxide superconductors, Karlsruhe (Germany), 2-6 Aug 1996; Other Information: PBD: Dec 1996
- Country of Publication:
- United States
- Language:
- English
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