| Autor: |
Shaltiel, D., von Nidda, H-A. Krug, Rosenstein, B., Shapiro, B. Ya., Golosovsky., M., Shapiro, I., Loidl, A., Bogoslavsky, B., Fujii, T., Watanabe, T., Tamegai, T. |
| Rok vydání: |
2009 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/0953-2048/23/7/075001 |
| Popis: |
A memory effect in the Josephson vortex system created by magnetic field in the highly anisotropic superconductors Bi2212 and Bi2223 is demonstrated using microwave power absorption. This surprising effect appears despite a very low viscosity of Josephson vortices compared to Abrikosov vortices. The superconductor is field cooled in DC magnetic field H_{m} oriented parallel to the CuO planes through the critical temperature T_{c} down to 4K, with subsequent reduction of the field to zero and again above H_{m}. Large microwave power absorption signal is observed at a magnetic field just above the cooling field clearly indicating a memory effect. The dependence of the signal on deviation of magnetic field from H_{m} is the same for a wide range of H_{m} from 0.15T to 1.7T. |
| Databáze: |
arXiv |
| Externí odkaz: |
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