Influence of Fe doping and FeNi-layer thickness on the magnetic properties and GMI effect of electrodeposited Ni100-xFex/Cu (x = 0–95) wires

MT Tung, NV Dung, NH Nghi, MH Phan, H-X Peng

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

4 Citations (Scopus)

Abstract

A systematic study has been performed by the influence of Fe doping and FeNi-layer thickness on the giant magnetoimpedance (GMI) effect of electrodeposited Ni100-xFex/Cu (x = 0–95) composite wires. Results obtained show that there is a correlation between the structure, soft magnetic properties and the GMI effect. Among the compositions investigated, the largest MI ratio is achieved for Ni44Fe56/Cu as a result of it having the softest magnetic property (i.e. the lowest coercivity), which arises from the smallest nanograin size. As the NiFe-layer thickness (t) increases from 1 to 27.4 µm, the GMI ratio initially increases, reaches a maximum of 110% at t = 27.4 µm and then decreases for t > 27.4 µm. Interestingly, GMI curves show a single-peak feature for wires with t <20 µm, but a double-peak one for wires with t ≥ 20 µm. This indicates that there is a formation of a circular domain structure with a well-defined circumferential anisotropy in the NiFe magnetic layer of the wires with t ≥ 20 µm. This in turn results in a great improvement in the GMI effect of these wires.
Translated title of the contributionInfluence of Fe doping and FeNi-layer thickness on the magnetic properties and GMI effect of electrodeposited Ni100-xFex/Cu (x = 0–95) wires
Original languageEnglish
Pages (from-to)1 - 6
Number of pages6
JournalJournal of Physics D: Applied Physics
Volume41 (10, 105003)
DOIs
Publication statusPublished - May 2008

Bibliographical note

Publisher: IOP Publishing Ltd

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