Enhancement of perpendicular anisotropy of Co/Cu multilayer nanowires by phase doping

P. Y. Chen, S. F. Hu, C. Y. Huang, R. S. Liu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A multisegment structure of Co/Cu nanowires with tunable perpendicular anisotropy, associated with phase transformation, was fabricated. The mixed crystal structure, formed by doping nano grains of the hcp phase into the fcc phase in the cobalt structure, markedly improves the perpendicular anisotropy. Cobalt nano grains with the hcp phase with a preferred orientation, which were transformed from (100) to (002), by doping fcc nano grain with high preferred (111) orientation and additionally the effective magnetocrystalline energy density of mixed structure was increased, the perpendicular magnetic anisotropy can be enhanced and tunable. The magnetoresistance ratios along the parallel and perpendicular axes of nanowires are 23.4% and 7.2% respectively. This novel approach promises to be of strong interest for subsequent fabrication of phase-locked arrays of spin transfer nano-oscillators with increased output power for microwave applications.

Original languageEnglish
Pages (from-to)1609-1620
Number of pages12
JournalJournal of Electromagnetic Waves and Applications
Volume24
Issue number11-12
DOIs
Publication statusPublished - 2010 Jul 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

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