A μSR determination of the penetration depth in superconducting YNi2B2C

R. Cywinski*, Z. P. Han, R. Bewley, R. Cubitt, M. T. Wylie, E. M. Forgan, S. L. Lee, M. Warden, S. H. Kilcoyne

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Muon spin rotation (μSR) and magnetisation measurements have been used to characterise the superconducting state of YNi2B2C below Tc = 15 K. A measured Bc2 (0) of 6.0(5) T and Bc1 (0) of 36.9(5) mT from magnetisation measurements, together with the μSR measurements, provide a coherence length, ξ(0), of 8.1 nm and a magnetic penetration depth, λ(0), of 103 nm. The temperature dependence of the penetration depth deduced from the μSR measurements is consistent with the BCS model and implies conventional s wave pairing in YNi2B2C. Using these results together with existing thermodynamic data we estimate a superconducting carrier density of 1.9 per formula unit and an electron-mass enhancement factor of 9.4.

Original languageEnglish
Pages (from-to)273-280
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume233
Issue number3-4
DOIs
Publication statusPublished - 20 Nov 1994

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