Muon-Spin Rotation Measurements of the Magnetic Field Dependence of the Vortex-Core Radius and Magnetic Penetration Depth in NbSe{sub 2}
- TRIUMF, Canadian Institute for Advanced Research and Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T1Z1 (CANADA)
- Department of Physics, Columbia University, New York, New York 10027 (United States)
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
Muon-spin rotation spectroscopy ({mu}SR) has been used to measure the internal magnetic field distribution in NbSe{sub 2} for H{sub c1}{lt}H{lt}0.25H{sub c2} . The deduced profiles of the supercurrent density J{sub s} indicate that the vortex-core radius {rho}{sub 0} 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 {rho}{sub 0} 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 {lambda}{sub ab} increases linearly with H in the vortex state of a conventional superconductor. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 538642
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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