Evidence for mean free path fluctuation induced pinning in YBa2Cu3O7 and YBa2Cu4O8 films

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Evidence for mean free path fluctuation induced pinning in YBa2Cu3O7 and YBa2Cu4O8 films

Journal Article (1994)

Author(s)

R. Griessen (Vrije Universiteit Amsterdam)

Hai-Hu Wen Hai-Hu (Vrije Universiteit Amsterdam)

A. J.J. Van Dalen (Vrije Universiteit Amsterdam)

B. Dam (Vrije Universiteit Amsterdam)

J. Rector (Vrije Universiteit Amsterdam)

H. G. Schnack (Vrije Universiteit Amsterdam)

S. Libbrecht (Katholieke Universiteit Leuven)

E. Osquiguil (Katholieke Universiteit Leuven)

Y. Bruynseraede (Katholieke Universiteit Leuven)

Affiliation

External organisation

DOI related publication

https://doi.org/10.1103/PhysRevLett.72.1910 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:416720b9-a1e3-471b-8340-9c4b493ac7d9

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Publication Year

1994

Language

English

Affiliation

External organisation

Journal title

Physical Review Letters

Issue number

12

Volume number

72

Pages (from-to)

1910-1913

Downloads counter

78

Abstract

The critical current jc and the pinning energy Uc have been determined for three types of yttrium-based superconducting films from current js and dynamic relaxation Q=d lnjs/d ln(dB/dt) data by means of the generalized inversion scheme. For B<2 T and T<80 K the temperature dependence of jc and Uc for all films is found to be in excellent agreement with a model of single vortices pinned by randomly distributed weak pinning centers via spatial fluctuations of the charge carrier mean free path. Pinning due to spatial fluctuations of Tc is not observed.