Magnetoimpedance effect of current-annealed CoNiFe/Cu microtubes

ATALAY F., KAYA H., ATALAY S.

PHYSICA B-CONDENSED MATTER, vol.403, no.17, pp.2917-2923, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 403 Issue: 17
  • Publication Date: 2008
  • Doi Number: 10.1016/j.physb.2008.02.034
  • Journal Name: PHYSICA B-CONDENSED MATTER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2917-2923
  • Inonu University Affiliated: Yes

Abstract

A cobalt/nickel/iron (CoNiFe) magnetic layer was electrodeposited on a 50-mu m-diameter non-magnetic Cu wire in a sulphate bath using a constant voltage. Electrodeposited CoNiFe composite wires were submitted to current annealing at 540 mA. It was found that annealing time less than 1 min removes internal stresses produced during fabrication and that annealing times longer than 5 min induce circumferential anisotropy. Non-annealed sample showed a magnetoimpedance (MI) ratio of 412%. A maximum MI ratio of 583% was obtained after I min of current annealing. (C) 2008 Elsevier B.V. All rights reserved.