Effect of Nanocrystallization on Magnetic Properties and GMI Effect of Microwires

Author

Zhukov, Arcady P. ; Talaat, Ahmed ; Ipatov, Mihail ; Blanco, Juan M. ; Gonzalez-Legarreta, Lorena ; Hernando, Blanca ; Zhukova, Valentina

Author_Institution

Dept. Fis. de Mater., UPV/EHU, San Sebastian, Spain

Volume

50

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

We studied giant magnetoimpedance (GMI) effect and magnetic properties of FINEMET-type FeCuNbSiB microwires. We observed that the GMI effect and magnetic softness of glass-coated microwires produced by the Taylor-Ulitovski technique can be tailored either controlling magnetoelastic anisotropy of as-prepared FeCuNbSiB microwires or controlling their structure by heat treatment or changing the fabrication conditions. We observed considerable magnetic softening of studied microwires after annealing. This magnetic softening correlates with the devitrification of amorphous samples. Amorphous microwires exhibited low GMI effect (GMI ratio below 5%). Considerable enhancement of the GMI effect (GMI ratio up to 100%) has been observed in heat treated microwires with nanocrystalline structure. Some of as-prepared Fe-rich exhibited nanocrystalline structure and the GMI ratio up to 45%.

Keywords

amorphous magnetic materials; annealing; boron alloys; copper alloys; crystallisation; giant magnetoresistance; iron alloys; magnetic anisotropy; magnetic structure; magnetoelastic effects; nanofabrication; nanomagnetics; nanostructured materials; nanowires; niobium alloys; silicon alloys; soft magnetic materials; vitrification; FINEMET-type iron copper alloy microwires; Fe_73.8CuNb_3.1Si₁₃B_9.1; GMI effect; Taylor-Ulitovski technique; amorphous microwires; amorphous samples; annealing; devitrification; giant magnetoimpedance effect; glass-coated microwires; heat treatment; magnetic properties; magnetic softening; magnetic structure; magnetoelastic anisotropy; metallic glass; nanocrystalline structure; nanocrystallization effect; Amorphous magnetic materials; Annealing; Magnetic hysteresis; Magnetostriction; Perpendicular magnetic anisotropy; Soft magnetic materials; Giant magnetoimpedance (GMI) effect; magnetic anisotropy; thin microwires;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2303396

Filename

6832767