Abstract
Dc resistivity and ac susceptibility have been measured simultaneously on Y−Ba−Cu−O specimens under the effect of a temperature gradient. During cooling process, an intermediate (normal-superconducting) state of samples forms in the vicinity ofT c and an artificial, local, step-like change of temperature induces an oscillatory relaxation of the measured parameter. This phenomenon has been interpreted in the framework of a vortexglass model as a collective relaxation of vortices inside a domain volume defined by vortex-glass correlation length. Close to theT c the domain relaxation time and the correlation length have been determined as 51 s and 2 mm, respectively.
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Bódi, A.C., Kirschner, I. & Leppävuori, S. Thermally induced oscillatory relaxation of dc resistivity and ac susceptibility in Y−Ba−Cu−O during N−S transition. Z. Physik B - Condensed Matter 97, 481–485 (1995). https://doi.org/10.1007/BF01322427
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DOI: https://doi.org/10.1007/BF01322427