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

doi:10.1103/PhysRevLett.79.1742

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

Physics And Astronomy

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Abstract

Muon-spin rotation spectroscopy (μ SR) has been used to measure the internal magnetic field distribution in NbSe₂ for H_c1 ≪ H < 0.25H_c2. The deduced profiles of the supercurrent density J_s 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 λ_ab increases linearly with H in the vortex state of a conventional superconductor. 1997

Original language	English
Pages (from-to)	1742-1745
Number of pages	4
Journal	Physical Review Letters
Volume	79
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.79.1742
State	Published - Jan 1 1997

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Physics and Astronomy (all)

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Sonier, J. E., Kiefl, R. F., Brewer, J. H., Chakhalian, J., Dunsiger, S. R., Mac Farlane, W. A., Miller, R. I., Wong, A., Luke, G. M., & Brill, J. W. (1997). Muon-spin rotation measurements of the magnetic field dependence of the vortex-core radius and magnetic penetration depth in NbSe₂. Physical Review Letters, 79(9), 1742-1745. https://doi.org/10.1103/PhysRevLett.79.1742

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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",

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

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AU - Sonier, J. E.

AU - Kiefl, R. F.

AU - Brewer, J. H.

AU - Chakhalian, J.

AU - Dunsiger, S. R.

AU - Mac Farlane, W. A.

AU - Miller, R. I.

AU - Wong, A.

AU - Luke, G. M.

AU - Brill, J. W.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - 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

AB - 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

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

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