Flux-flow-induced giant magnetoresistance in all-amorphous superconductor-ferromagnet hybrids

C. Bell*, S. Tursucu, J. Aarts, Chris Bell

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

34 Citations (Scopus)

Abstract

We present magnetoresistance measurements on all-amorphous ferromagnet (F)/superconductor (S) heterostructures. The F/S/F trilayers show large magnetoresistance peaks in a small field range around the coercive field of the F layers, at temperatures within and below the superconducting transition. This is interpreted as flux flow of weakly pinned vortices induced by the stray field of Bloch magnetic domains in the F layers. Bilayers show much smaller effects, implying that the Bloch walls of the F layers in the trilayer line up and focus the stray fields. The data are used to discuss the expected minimum F-layer thickness needed to nucleate vortices.

Original languageEnglish
Article number214520
Number of pages6
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume74
Issue number21
DOIs
Publication statusPublished - Dec 2006

Keywords

  • THIN-FILMS
  • HETEROSTRUCTURES

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