Abstract:
The fluctuation-induced magnetoconductivity of the Bi2Sr2Ca2Cu3O10+x phase is studied above zero-field critical temperature Tc(0) and for moderate magnetic fields. It is found that the Gaussian approximation for superconducting fluctuations underestimates the negative fluctuation magnetoconductance drastically in the Tc(0) < T < Tc(0) + 20 K temperature range. Taking into account the critical fluctuation contribution on the base of self-consistent Hartree approximation makes it possible to explain the data quantitatively in terms of the only Aslamazov-Larkin contribution for different magnetic fields and temperatures, consistently with the zero field data.
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Received 14 April 2000 and Received in final form 13 July 2000
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Livanov, D., Varlamov, A., Putti, M. et al. Evidence of critical fluctuations from the magnetoconductivity data in Bi2Sr2Ca2Cu3O10+x phase. Eur. Phys. J. B 18, 401–404 (2000). https://doi.org/10.1007/s100510070025
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DOI: https://doi.org/10.1007/s100510070025