Effects of superconducting gap anisotropy on the flux flow resistivity in Y(N1-xPtx)2B2C

K. Takaki; A. Koizumi; T. Hanaguri; M. Nohara; H. Takagi; K. Kitazawa; Y. Kato; Y. Tsuchiya; H. Kitano; A. Maeda

Effects of superconducting gap anisotropy on the flux flow resistivity in Y(N_1-xPt_x)₂B₂C

K. Takaki, A. Koizumi, T. Hanaguri, M. Nohara, H. Takagi, K. Kitazawa, Y. Kato, Y. Tsuchiya, H. Kitano, A. Maeda

Research output: Contribution to journal › Article › peer-review

Abstract

The microwave complex surface impedance Z_s of Y(Ni_1-xPt_x)₂B₂C was measured at 0.5 K under magnetic fields H up to 7 T. In nominally pure YNi₂B₂C, which is a strongly anisotropic s-wave superconductor, the flux flow resistivity ρ_f calculated from Z_s was twice as large as that expected from the conventional normal-state vortex core model. In Pt-doped samples where the gap anisotropy is smeared out, the enhancement of ρ_f is reduced and ρ_f approaches the conventional behavior. These results indicate that the energy dissipation in the vortex core is strongly affected by the anisotropy of the superconducting gap.

Original language	English
Article number	184511
Pages (from-to)	1845111-1845115
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	18
Publication status	Published - Nov 1 2002
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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title = "Effects of superconducting gap anisotropy on the flux flow resistivity in Y(N1-xPtx)2B2C",

abstract = "The microwave complex surface impedance Zs of Y(Ni1-xPtx)2B2C was measured at 0.5 K under magnetic fields H up to 7 T. In nominally pure YNi2B2C, which is a strongly anisotropic s-wave superconductor, the flux flow resistivity ρf calculated from Zs was twice as large as that expected from the conventional normal-state vortex core model. In Pt-doped samples where the gap anisotropy is smeared out, the enhancement of ρf is reduced and ρf approaches the conventional behavior. These results indicate that the energy dissipation in the vortex core is strongly affected by the anisotropy of the superconducting gap.",

author = "K. Takaki and A. Koizumi and T. Hanaguri and M. Nohara and H. Takagi and K. Kitazawa and Y. Kato and Y. Tsuchiya and H. Kitano and A. Maeda",

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TY - JOUR

T1 - Effects of superconducting gap anisotropy on the flux flow resistivity in Y(N1-xPtx)2B2C

AU - Takaki, K.

AU - Koizumi, A.

AU - Hanaguri, T.

AU - Nohara, M.

AU - Takagi, H.

AU - Kitazawa, K.

AU - Kato, Y.

AU - Tsuchiya, Y.

AU - Kitano, H.

AU - Maeda, A.

PY - 2002/11/1

Y1 - 2002/11/1

N2 - The microwave complex surface impedance Zs of Y(Ni1-xPtx)2B2C was measured at 0.5 K under magnetic fields H up to 7 T. In nominally pure YNi2B2C, which is a strongly anisotropic s-wave superconductor, the flux flow resistivity ρf calculated from Zs was twice as large as that expected from the conventional normal-state vortex core model. In Pt-doped samples where the gap anisotropy is smeared out, the enhancement of ρf is reduced and ρf approaches the conventional behavior. These results indicate that the energy dissipation in the vortex core is strongly affected by the anisotropy of the superconducting gap.

AB - The microwave complex surface impedance Zs of Y(Ni1-xPtx)2B2C was measured at 0.5 K under magnetic fields H up to 7 T. In nominally pure YNi2B2C, which is a strongly anisotropic s-wave superconductor, the flux flow resistivity ρf calculated from Zs was twice as large as that expected from the conventional normal-state vortex core model. In Pt-doped samples where the gap anisotropy is smeared out, the enhancement of ρf is reduced and ρf approaches the conventional behavior. These results indicate that the energy dissipation in the vortex core is strongly affected by the anisotropy of the superconducting gap.

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Effects of superconducting gap anisotropy on the flux flow resistivity in Y(N_1-xPt_x)₂B₂C

Abstract

ASJC Scopus subject areas

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