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Titolo:
Evaluation of supercurrent distribution in high-T-c superconductor by scanning SQUID microscopy
Autore:
Sugimoto, A; Yamaguchi, T; Iguchi, I;
Indirizzi:
Tokyo Inst Technol, JST, Dept Phys, Meguro Ku, Tokyo 1528551, Japan Tokyo Inst Technol Tokyo Japan 1528551 , Meguro Ku, Tokyo 1528551, Japan Tokyo Inst Technol, JST, CREST, Tokyo 1528551, Japan Tokyo Inst Technol Tokyo Japan 1528551 JST, CREST, Tokyo 1528551, Japan
Titolo Testata:
PHYSICA C
, volume: 357, anno: 2001,
parte:, 2
pagine: 1473 - 1477
SICI:
0921-4534(200108)357:<1473:EOSDIH>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATURE; MAGNETOMETER; QUANTUM;
Keywords:
scanning SQUID microscope; current distribution; vortex; HTSC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Sugimoto, A Tokyo Inst Technol, JST, Dept Phys, Meguro Ku, 2-12-1 Ohokayama, Tokyo 1528551, Japan Tokyo Inst Technol 2-12-1 Ohokayama Tokyo Japan 1528551 Japan
Citazione:
A. Sugimoto et al., "Evaluation of supercurrent distribution in high-T-c superconductor by scanning SQUID microscopy", PHYSICA C, 357, 2001, pp. 1473-1477

Abstract

Scanning SQUID microscope (SSM) is a powerful tool for observing small magnetic flux. It measures the z-component signal of flux density, but it is also available for observation of current distribution by inverting the Biot-Savart's law. We report the two-dimensional vector mapping of current distributions in high-T-c superconducting YBa2Cu3O7-gamma (YBCO) thin films obtained by converting magnetic-field data measured by SSM. The current distribution contains those from both transport supercurrent and vortex current. The transport supercurrent is found to flow mainly along the edge of a stripline. The results are in good qualitative agreement with the calculated results based on simple London model, The YBCO films with an artificial grainboundary, i.e. Josephson boundary are also observed. The transport currentseems to flows with avoiding the vortices, and an irregular vortex is observed at a point of grain boundary. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 14/07/20 alle ore 05:49:32