Matching effect and flux pinning force in a Nb superconducting thin film with a triangular lattice of artificial pinning centers

Lance Horng, Jong-Ching Wu, P. C. Kang, T. C. Wu, T. J. Yang

Research output: Contribution to journalArticle

Abstract

A strong pinning force in a Nb superconducting thin film is formed by a triangular lattice of defects due to the structural corrugation that acts as pinning centers. The magnetoresistance measurement close to the transition temperature shows a set of minima of magnetoresistance at equal external field intervals. A crossover in current-voltage relations with matching field and half-integer matching field occurs for currents exceeding a certain threshold value. The phenomenon is related to the presence of pinning structures at matching fields.

Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2004 May 1

Fingerprint

Flux pinning
Superconducting films
flux pinning
Magnetoresistance
thin films
Superconducting transition temperature
Defects
integers
crossovers
Electric potential
transition temperature
intervals
thresholds
defects
electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Matching effect and flux pinning force in a Nb superconducting thin film with a triangular lattice of artificial pinning centers. / Horng, Lance; Wu, Jong-Ching; Kang, P. C.; Wu, T. C.; Yang, T. J.

In: Journal of Magnetism and Magnetic Materials, Vol. 272-276, No. SUPPL. 1, 01.05.2004.

Research output: Contribution to journalArticle

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AU - Wu, Jong-Ching

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AU - Yang, T. J.

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