Measurement of the magnetic penetration depth of a superconducting MgB2 thin film with a large intraband diffusivity
SCIE
SCOPUS
- Title
- Measurement of the magnetic penetration depth of a superconducting MgB2 thin film with a large intraband diffusivity
- Authors
- Kim, Jeehoon; Haberkorn, N.; Lin, Shi-Zeng; Civale, L.; Nazaretski, E.; Moeckly, B. H.; Yung, C. S.; Thompson, J. D.; Movshovich, R.
- Date Issued
- 2012-07
- Publisher
- American Physical Society
- Abstract
- We report the temperature-dependent magnetic penetration depth λ(T) and the superconducting critical field H c2(T) in a 500-nm MgB 2 film. Our analysis of the experimental results takes into account the two-gap nature of the superconducting state and indicates larger intraband diffusivity in the three-dimensional (3D) π band compared to that in the two-dimensional (2D) σ band. Direct comparison of our results with those reported previously for single crystals indicates that larger intraband scattering in the 3D π band leads to an increase of λ. We calculated λ and the thermodynamic critical field H c≈2000 Oe by employing the gap equations for two-band superconductors. Good agreement between the measured and calculated λ value indicates the two independent measurements, such as magnetic force microscopy and transport, provide a venue for investigating superconducting properties in multiband superconductors. © 2012 American Physical Society.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123922
- DOI
- 10.1103/physrevb.86.024501
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- Physical Review B - Condensed Matter and Materials Physics, vol. 86, no. 2, 2012-07
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