Open AccessМагнитная анизотропия и сверхвысокочувствительный стресс-магнитоимпеданс в микропроводах с положительной магнитострикцией
Author(s) -
М.Г. Неъматов,
Л.В. Панина,
А. Джумъазода,
Н.А. Юданов,
А.Т. Морченко,
М.А. Джураев
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.08.47970.389
Subject(s) - materials science , annealing (glass) , anisotropy , magnetization , ferromagnetism , amorphous solid , magnetic anisotropy , condensed matter physics , magnetic field , stress (linguistics) , joule heating , magnetostriction , giant magnetoimpedance , composite material , magnetoresistance , optics , physics , crystallography , giant magnetoresistance , chemistry , linguistics , philosophy , quantum mechanics
In glass-coated Co_71Fe_5B_11Si_10Cr_3 amorphous ferromagnetic microwires subjected to current annealing, a record sensitivity of the magnetoimpedance (MI) to mechanical tensile stresses (stress MI) up to 100% at 100 MPa in the absence of additional magnetic bias fields is achieved. The current annealing, combining the effect of Joule heating and a circular magnetic field, induces a specific helicoidal/circular-type magnetic anisotropy and, thus, allows one to control the behavior of the MI and stress MI, making the wires more suitable for use in sensor devices. As a result of changing the direction of the easy anisotropy axis, external mechanical stresses lead to a change in the direction of the static magnetization, which causes an increase in the sensitivity of stress MI.