Microscopic properties of vortex states in Y B6 probed by muon spin rotation

R. Kadono, S. Kuroiwa, Jun Akimitsu, A. Koda, K. Ohishi, W. Higemoto, S. Otani

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The local magnetic field distribution B (r) in the mixed state of a boride superconductor, Y B6, is studied by muon spin rotation (μSR). A comparative analysis using the modified London model and Ginzburg-Landau (GL) model indicates that the latter exhibits a better agreement with μSR data at higher fields and thus demonstrating the importance of reproducing the field profile near the vortex cores when the intervortex distance becomes closer to the GL coherence length. The temperature and field dependence of the magnetic penetration depth (λ) does not exhibit any indications of the nonlocal effect or of low-lying quasiparticle excitation. This suggests that the strong coupling of electrons to the rattling motion of Y ions in the boron cage, as suggested by bulk measurements, induces a conventional superconductivity with isotropic s -wave pairing. Considering the present results, a review is provided for probing the anisotropy of the superconducting order parameters by the slope of λ against the field (η dλ dH).

Original languageEnglish
Article number094501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number9
DOIs
Publication statusPublished - Sep 4 2007
Externally publishedYes

Fingerprint

muon spin rotation
Vortex flow
Boron Compounds
vortices
Boron
borides
Borides
Superconductivity
Superconducting materials
indication
boron
Anisotropy
temperature distribution
superconductivity
penetration
Ions
Magnetic fields
slopes
temperature dependence
anisotropy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Microscopic properties of vortex states in Y B6 probed by muon spin rotation. / Kadono, R.; Kuroiwa, S.; Akimitsu, Jun; Koda, A.; Ohishi, K.; Higemoto, W.; Otani, S.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 9, 094501, 04.09.2007.

Research output: Contribution to journalArticle

Kadono, R. ; Kuroiwa, S. ; Akimitsu, Jun ; Koda, A. ; Ohishi, K. ; Higemoto, W. ; Otani, S. / Microscopic properties of vortex states in Y B6 probed by muon spin rotation. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 76, No. 9.
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