Investigation of flux creep in high-Tc superconductors using Hall-sensor array

Y. Abulafia, D. Giller, Y. Wolfus, A. Shaulov, Y. Yeshurun, D. Majer, E. Zeldov, J. L. Peng, R. L. Greene

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The details of a new method for studying thermally activated flux creep in thin superconducting samples is described. The method employs a linear array of microscopic Hall sensors to measure the time and spatial dependence of the magnetic induction across the sample. These data are analyzed on the basis of the local rate equation for thermally activated flux motion, taking into account both the in-plane and out-of-plane components of the induction field. Following this analysis, flux creep parameters, such as the flux-line current density, flux-line average velocity, and the activation energy for flux creep, can be directly determined as a function of position and time. New experimental data in a superconducting Nd1.85Ce0.15CuO4-δ crystal demonstrate this method.

Original languageEnglish
Pages (from-to)4944-4946
Number of pages3
JournalJournal of Applied Physics
Issue number8 PART 2B
StatePublished - 15 Apr 1997


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