| Record |
| Author |
Kim, J.; Haberkorn, N.; Nazaretski, E.; Paula, R. de; Tan, T.; Xi, X.X.; Tajima, T.; Movshovich, R.; Civale, L. |
| Title |
Strong magnetic field dependence of critical current densities and vortex activation energies in an anisotropic clean MgB2 thin film |
Type |
Journal Article |
| Year |
2015 |
Publication  |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
204 |
Issue |
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Pages |
56-60 |
| Keywords |
A. Superconducting materials; B. Films; C. Magnetic penetration depth; D. Vortex pinning |
| 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 λ=50±10 nm at T=4 K is related to a clean π-band. We find a high self-field critical current density Jc, which is strongly reduced with applied magnetic field, and attribute this to suppression of the superconductivity in the π-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. |
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Edition |
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| ISSN |
0038-1098 |
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no |
| Call Number |
BT @ pedrazp @ |
Serial |
729 |
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