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Träfflista för sökning "WFRF:(Bratsberg H.) srt2:(1999)"

Sökning: WFRF:(Bratsberg H.) > (1999)

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1.
  • Koblischka, M. R., et al. (författare)
  • Magneto-optic imaging of flux penetration into an artificially granular high-Tc superconductor
  • 1999
  • Ingår i: Advances in Superconductivity XI. Proceedings of the 11th International Symposium on Superconductivity (ISS'98). - 4431702563 ; 2, s. 693-696
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • 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
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2.
  • Koblishka, M. R., et al. (författare)
  • Flux penetration into an artificially granular high-Tc superconductor
  • 1999
  • Ingår i: Physical Review B. - 2469-9969 .- 2469-9950. ; 59, s. 12114-20
  • Tidskriftsartikel (refereegranskat)abstract
    • A YBa2Cu3O7- thin film is patterned into a hexagonal close-packed lattice of disks (2r=50 m) 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 (Pb,Bi)2Sr2Ca2Cu3O10+ (Bi-2223) tape. The magnetization measurements reveal an anomalous position of the low-field peak (central peak) similar to Bi-2223 tapes. Magneto-optic imaging is employed to visualize the local-field distributions. At low magnification, the flux patterns in the intergranular area between the disks are observed. The observations at high magnification reveal the flux penetration and pinning within the disks. It is shown that such samples may serve as model samples for granular high-Tc superconductors
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