CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Flux penetration into an artificially granular high-Tc superconductor

M. R. Koblishka ; L. Pust ; A. Galkin ; P. Nalevka ; M. Jirsa ; T. H. Johansen ; H. Bratsberg ; Bengt Nilsson (Institutionen för fysik) ; Tord Claeson (Institutionen för fysik)
Physical Review B (Condensed Matter) (0163-1829). Vol. 59 (1999), p. 12114-20.
[Artikel, refereegranskad vetenskaplig]

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

Nyckelord: barium compounds, flux flow, flux pinning, granular structure, high-temperature superconductors, penetration depth (superconductivity), superconducting thin films, yttrium compounds

Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2011-10-21. Senast ändrad 2011-11-02.
CPL Pubid: 147532


Läs direkt!

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för fysik (1900-2003)


Nanovetenskap och nanoteknik
Den kondenserade materiens fysik

Chalmers infrastruktur