Spin dynamics in a superconductor-ferromagnet proximity system

C. Bell*, S. Milikisyants, M. Huber, J. Aarts, Chris Bell

*Corresponding author for this work

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

58 Citations (Scopus)

Abstract

The ferromagnetic resonance of thin sputtered Ni(80)Fe(20) films grown on Nb is measured. By varying the temperature and the thickness of the Nb the role of the superconductivity on the whole ferromagnetic layer in these heterostructures is explored. The change in the spin transport properties below the superconducting transition of the Nb is found to manifest itself in the Ni(80)Fe(20) layer by a sharpening in the resonance of the ferromagnet, or a decrease in the effective Gilbert damping coefficient, showing that the superconductivity affects the macrospin of the ferromagnetic layer. We interpret this in terms of the spin-pumping model.

Original languageEnglish
Article number047002
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number4
DOIs
Publication statusPublished - 1 Feb 2008

Keywords

  • ANDREEV REFLECTION
  • RESONANCE LINEWIDTH
  • FILMS
  • HETEROSTRUCTURES
  • JUNCTIONS
  • NM
  • TA
  • CU
  • PD

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