4.4 Article

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

Journal

THIN SOLID FILMS
Volume 517, Issue 21, Pages 6081-6090

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2009.05.005

Keywords

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

Funding

  1. Hungarian Scientific Research Fund (OTKA) [K-60821]
  2. Generalitat de Catalunya
  3. Fons Social Europeu

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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. (C) 2009 Elsevier B.V. All rights reserved.

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