Paramagnetic meissner effect and AC magnetization in roll-bonded Cu-Nb layered composites

M. J R Sandim, D. Stamopoulos, L. Ghivelder, S. C V Lim, A. D. Rollett

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Abstract

The paramagnetic Meissner effect (PME) is related to the appearance of a positive magnetization when a superconducting specimen is field cooled through its critical temperature. In this work we report on the PME and ac magnetization in roll-bonded Cu-Nb (RB/Cu-Nb) layered composites. We present typical DC magnetization loops obtained in the normal magnetic field configuration that show the PME. In addition, we present ac magnetization measurements that reveal a crossover behavior at a characteristic field value. We show evidence that such a crossover behavior, attributed to activation processes of vortices, is probably related to the disappearance of the PME in the RB/Cu-Nb layered composites.

Original languageEnglish
Pages (from-to)1533-1541
Number of pages9
JournalJournal of Superconductivity and Novel Magnetism
Volume23
Issue number8
DOIs
Publication statusPublished - Dec 2010
Externally publishedYes

Keywords

  • Ac magnetization
  • Cu-Nb
  • Layered composite
  • Paramagnetic Meissner effect

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