Effect of Shape and Annealing on the Giant Magnetoimpendence Properties of FeCoSiB Ribbon

Author

Fang Jin ; Ling Zhou ; Weiming Cheng ; Yue Zhang ; Bei Tong ; Yongbing Xu

Author_Institution

Fac. of Mech. & Electron. Inf., China Univ. of Geosci., Wuhan, China

Volume

50

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

1

Lastpage

4

Abstract

The annealing process and shape are expected to significantly affect the magnetic properties and giant magnetoimpedance (GMI) effect of magnetic amorphous ribbon. Here, the GMI effect in the annealed samples of FeCoSiB with different aspect ratios was studied at the frequency range between 1 and 40 MHz. Magnetic properties and microstructures of samples were investigated by vibrating sample magnetometer and X-ray diffraction. With the increasing of annealing temperature, the coercivity was decreased from 1.1 Oe at room temperature to 0.18 Oe at 400 °C annealing temperature, and the sensitivity of GMI effect increased from 10%/Oe to 140%/Oe. The aspect ratio of the ribbon was found to affect the excitation frequency, which leads the GMI effect to the maximum due to the shape induced demagnetization field, regardless of the annealing temperature.

Keywords

X-ray diffraction; amorphous magnetic materials; annealing; boron alloys; cobalt alloys; coercive force; crystal microstructure; demagnetisation; giant magnetoresistance; iron alloys; magnetometry; silicon alloys; FeCoSiB; FeCoSiB ribbon; X-ray diffraction; XRD; annealing effect; annealing temperature; aspect ratios; coercivity; excitation frequency; frequency 1 MHz to 40 MHz; giant magnetoimpedance effect; magnetic amorphous ribbon; magnetic properties; microstructures; shape effect; shape induced demagnetization field; temperature 293 K to 298 K; temperature 400 degC; vibrating sample magnetometer; Amorphous magnetic materials; Annealing; Magnetic hysteresis; Magnetometers; Sensitivity; Shape; Annealing; FeCoSiB ribbon; aspect ratio; giant magnetoimpedance (GMI) effect;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2329281

Filename

6826516