Muon-spin rotation measurements of the magnetic field dependence of the vortex-core radius and magnetic penetration depth in NbSe2

J. E. Sonier, R. F. Kiefl, J. H. Brewer, J. Chakhalian, S. R. Dunsiger, W. A. Mac Farlane, R. I. Miller, A. Wong, G. M. Luke, J. W. Brill

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84 Scopus citations

Abstract

Muon-spin rotation spectroscopy (μ SR) has been used to measure the internal magnetic field distribution in NbSe2 for Hc1 ≪ H < 0.25Hc2. The deduced profiles of the supercurrent density Js indicate that the vortex-core radius ρ0 in the bulk decreases sharply with increasing magnetic field. This effect, which is attributed to increased vortex-vortex interactions, does not agree with the dirty-limit microscopic theory. A simple phenomenological equation in which ρ0 depends on the intervortex spacing is used to model this behavior. In addition, we find for the first time that the in-plane magnetic penetration depth λab increases linearly with H in the vortex state of a conventional superconductor. 1997

Original languageEnglish
Pages (from-to)1742-1745
Number of pages4
JournalPhysical Review Letters
Volume79
Issue number9
DOIs
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • General Physics and Astronomy

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