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Structures in superconducting YBa2Cu3O7-delta thin films investigated by magneto-optic technique

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1996

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Eisenmenger, Johannes
Kambach, S.
Saleh, Said Ibrahim Ahmed
Tihi, Alen
Wallenhorst, Michael
Dötsch, Horst

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Journal of Low Temperature Physics. 1996, 105(5-6), pp. 1123-1128. Available under: doi: 10.1007/BF00753850

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Using a reflection magneto-optic technique we have investigated natural inhomogeneities and artificial struetures 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 we 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.

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ISO 690EISENMENGER, Johannes, S. KAMBACH, Said Ibrahim Ahmed SALEH, Alen TIHI, Paul LEIDERER, Michael WALLENHORST, Horst DÖTSCH, 1996. Structures in superconducting YBa2Cu3O7-delta thin films investigated by magneto-optic technique. In: Journal of Low Temperature Physics. 1996, 105(5-6), pp. 1123-1128. Available under: doi: 10.1007/BF00753850
BibTex
@article{Eisenmenger1996Struc-5216,
  year={1996},
  doi={10.1007/BF00753850},
  title={Structures in superconducting YBa2Cu3O7-delta thin films investigated by magneto-optic technique},
  number={5-6},
  volume={105},
  journal={Journal of Low Temperature Physics},
  pages={1123--1128},
  author={Eisenmenger, Johannes and Kambach, S. and Saleh, Said Ibrahim Ahmed and Tihi, Alen and Leiderer, Paul and Wallenhorst, Michael and Dötsch, Horst}
}
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