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Magneto-optic imaging of flux penetration into an artificially granular high-Tc superconductor

M. R. Koblischka ; L. Pust ; P. Nalevka ; M. Jirsa ; T. H. Johansen ; H. Bratsberg ; Bengt Nilsson (Institutionen för fysik) ; Tord Claeson (Institutionen för fysik)
Advances in Superconductivity XI. Proceedings of the 11th International Symposium on Superconductivity (ISS'98) Vol. 2 (1999), p. 693-696.
[Konferensbidrag, övrigt]

A YBa2Cu3O7- (YBCO) thin film is patterned into a hexagonal close packed lattice of disks which are touching each other at the circumferences in order to enable the flow of an intergranular current. Such a sample was suggested by Koblischka et al. [Appl. Phys. Lett 70, 514 (1997)] as a model for a layered granular structure like in a Bi2Sr2Ca2Cu3O10- tape. Magnetization measurements reveal an anomalous position of the low field peak (central peak) similar to the tapes. Magneto-optic imaging is employed to visualize the local field distributions

Nyckelord: barium compounds, granular structure, high-temperature superconductors, magnetisation, magneto-optical effects, penetration depth (superconductivity), superconducting thin films, yttrium compounds



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Denna post skapades 2011-10-21. Senast ändrad 2011-11-02.
CPL Pubid: 147558

 

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