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Field cooling memory effect in Bi2212 and Bi2223 single crystals

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arxiv 0907.5484 v1 pith:4MP7T6HN submitted 2009-07-31 cond-mat.supr-con

Field cooling memory effect in Bi2212 and Bi2223 single crystals

D. Shaltiel , H-A. Krug von Nidda , B. Rosenstein , B. Ya. Shapiro , M. Golosovsky. , I. Shapiro , A. Loidl , B. Bogoslavsky
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T. Fujii T. Watanabe T. Tamegai
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classification cond-mat.supr-con
keywords fieldeffectmagneticmemoryaboveabsorptionbi2212bi2223
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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.

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