Giant magnetoimpedance effect in ultrasoft FeAISiBCuNb nanocomposites for sensor applications

MH Phan, H-X Peng, MR Wisnom, Yu Seong-Cho

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

40 Citations (Scopus)

Abstract

Fe73–xAlxSi14B8.5Cu1Nb3.5 (x=0,2) nanocomposite materials consisting of a nanocrystalline phase in an amorphous matrix were obtained by annealing their precursor amorphous ribbons, which were prepared by the melt-spinning technique, at different temperatures ranging between 350 and 650 °C for 45 min in vacuum. Investigation on their magnetic and magnetoimpedance properties indicates that the Al-containing sample (x=2) possesses superior magnetic softness and giant magnetoimpedance (GMI) effect over the Al-free counterpart. This can be likely ascribed to the increased magnetic permeability, decreased coercive force, and decreased resistivity. The increased magnetic permeability results from a reduction in magnetocrystalline anisotropy and saturation magnetostriction. The correlations between magnetic softness, electrical properties, and GMI behavior are discussed in the light of the skin effect model. These results indicate that the Al-containing Fe-based nanocomposite material can be ideally used for high-performance GMI sensor applications.
Translated title of the contributionGiant magnetoimpedance effect in ultrasoft FeAISiBCuNb nanocomposites for sensor applications
Original languageEnglish
Pages (from-to)0146316-1 - 0146316-7
Number of pages7
JournalJournal of Applied Physics
Volume98 (1)
DOIs
Publication statusPublished - Jul 2005

Bibliographical note

Publisher: American Institute of Physics

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