Upper critical field, penetration depth, and depinning frequency of the novel high-temperature superconductor LaFeAsO$_{0.9}$F$_{0.1}$ studied by microwave surface impedance
| Autor: | Narduzzo, A., Grbi��, M. S., Po��ek, M., Dul��i��, A., Paar, D., Kondrat, A., Hess, C., Hellmann, I., Klingeler, R., Werner, J., K��hler, A., Behr, G., B��chner, B. |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Popis: | Temperature and magnetic field dependent measurements of the microwave surface impedance of superconducting LaFeAsO$_{0.9}$F$_{0.1}$ (\Tc $\approx$ 26K) reveal a very large upper critical field ($B_{\rm c2} \approx 56$T) and a large value of the depinning frequency ($f_{0}\approx 6$GHz); together with an upper limit for the effective London penetration depth, $\lambda_{\rm eff} \le 200 \rm nm$, our results indicate a strong similarity between this system and the high-$T_{\rm c}$ superconducting cuprates. Comment: 4 pages, 6 figures, minor corrections and rephrasing |
| Databáze: | OpenAIRE |
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