Structures in superconducting YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} thin films investigated by magneto-optic technique

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00753850· OSTI ID:443635

Eisenmenger, J; Kambach, S; Saleh, S; Tihi, A ^[1]

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1. 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--
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETO-OPTICAL EFFECTS
SUPERCONDUCTING FILMS
YTTRIUM OXIDES