Vortex glass scaling in Pb-doped Bi-2223 single crystal |
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Authors: | Yu F Eltsev S Lee K Nakao and S Tajima |
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Institution: | 1.Lebedev Physical Institute,Russian Academy of Sciences,Moscow,Russia;2.Superconductivity Research Laboratory,ISTEC,Tokyo,Japan;3.Osaka University, Toyonaka,Osaka,Japan |
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Abstract: | We report on study of the vortex liquid in Pb-doped Bi-2223 single crystal using the in-plane resistivity measurements as
a function of temperature and magnetic field up to 6 T applied perpendicular to CuO planes. Below T
c
at the upper part of superconducting transition we found Arrhenius-like resistivity behavior. With further temperature decrease
close to onset of dissipation resistivity shows power law dependence on temperature signaling approaching vortex-glass transition.
The critical exponents ν(z − 1) = 4.6 ± 0.5 are found to be field independent within experimental errors. We also present magnetic phase diagram defining
region of nonzero critical current for Pb-doped Bi-2223 single crystal. |
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Keywords: | |
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