Strong magnetic field dependence of critical current densities and vortex activation energies in an anisotropic clean MgB2 thin film
SCIE
SCOPUS
- Title
- Strong magnetic field dependence of critical current densities and vortex activation energies in an anisotropic clean MgB2 thin film
- Authors
- Kim, J; Haberkorn, N; Nazaretski, E; de Paula, R; Tan, T; Xi, XX; Tajima, T; Movshovich, R; Civale, L
- Date Issued
- 2015-02
- Publisher
- Elsevier BV
- Abstract
- We report the influence of two-band superconductivity on the flux creep and the critical current densities of a MgB2 thin film. The small magnetic penetration depth of lambda=50 +/- 10 nm at T=4 K is related to a clean pi-band. We find a high self-field critical current density J(C), which is strongly reduced with applied magnetic field, and attribute this to suppression of the superconductivity in the pi-band. The temperature dependence of the creep rate S (T) at low magnetic field can be explained by a simple Anderson-Kim mechanism. The system shows high pinning energies at low field that are strongly suppressed by high field. (C) 2014 Elsevier Ltd. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26777
- DOI
- 10.1016/J.SSC.2014.11.015
- ISSN
- 0038-1098
- Article Type
- Article
- Citation
- Solid State Communications, vol. 204, page. 56 - 60, 2015-02
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