Open AccessStatic magnetization and demagnetizing field distribution of the amorphous wire in non-uniform applied field
Author(s) -
Zhao Lei Yin,
HongGuang Xu,
Qinyu Zhang
Publication year - 2014
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.63.247502
Subject(s) - magnetization , condensed matter physics , demagnetizing field , amorphous solid , materials science , impulse (physics) , field (mathematics) , magnetic field , coaxial , physics , nuclear magnetic resonance , classical mechanics , electrical engineering , mathematics , quantum mechanics , chemistry , organic chemistry , pure mathematics , engineering
Currently, the giant magneto-impedance effect of amorphous wires is usually investigated on the hypothesis that demagnetizing field can be ignored. This hypothesis is not true for amorphous wires with small size. We propose a model for calculating the static magnetization and magnetic field distribution inside CoFe-rich amorphous wires, which divides the amorphous wire into coaxial and nonoverlaped circular rings with the same width and height and different radii. Calculating the impulse response of the demagnetizing field at point r to the magnetization in each ring, the impulse response matrix is obtained. Using the impulse response matrix, the static magnetization and demagnetizing field distribution in the amorphous wire placed in an uniform or non-uniform DC applied field can be obtained.