Preparation and giant magnetoresistance of electrodeposited Co-Ag/Ag multilayers

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Abstract

Electrodeposition of Co-Ag/Ag multilayers along with their giant magnetoresistance (GMR) was investigated. The electrodeposition process was optimized for both minimizing the dissolution of the Co layer and achieving a high magnetoresistance. Structural analysis of Co-Ag/Ag deposits revealed that silver has an fcc structure, whereas cobalt crystallizes in the hcp structure. No solid solution of Co and Ag was detected. The X-ray diffraction study did not show any satellite reflection. A GMR of the order of 0.5% and 2% could be observed at room temperature and at 20 K, respectively, with both superparamagnetic and ferromagnetic GMR contributions throughout the temperature range studied.

Original languageEnglish
Pages (from-to)6081-6090
Number of pages10
JournalThin Solid Films
Volume517
Issue number21
DOIs
Publication statusPublished - Sep 1 2009

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Keywords

  • Cobalt
  • Electrodeposition
  • Giant magnetoresistance (GMR)
  • Multilayer
  • Silver

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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