Open AccessThe Giant Magneto-Impedance Effect of Current-Annealed Fe-Based Ribbons
Author(s) -
Jun He,
Haijuan Guo,
Lizhi Cheng,
Baogen Shen,
He Kai-Yuan,
Yihua Liu
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.159
Subject(s) - annealing (glass) , materials science , condensed matter physics , skin effect , magnetic field , electrical impedance , giant magnetoimpedance , giant magnetoresistance , nuclear magnetic resonance , composite material , physics , magnetoresistance , quantum mechanics
The influence of current annealing process on the giant magneto-impedance (GMI) effect of Fe84Zr8Nb3.5Cu1 ribbons was studied. The obtained results showed that with increasing annealing current, the GMI ratio ΔZ/Z(ΔZ/Z=(Z(H)-Z(Hmax))/Z(Hmax)) is enhanced. The maximal GMI ratio of about 62% is obtained for the sample annealed at 820 mA for 10min, while the sensitivity can reach a value up to about 0.23% (A/m)-1. In combination with the evolution of electrical and soft magnetic properties, the dependence of the GMI effect on the frequency and applied longitudinal field has been discussed by means of skin effect.