Premium
Electric Conductivity of a Metallic Ferromagnet and Magnetization Process
Author(s) -
Zakharov Yu. V.,
Mankov Yu. I.,
Titov L. S.
Publication year - 1988
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221490126
Subject(s) - condensed matter physics , magnetization , magnetoresistance , ferromagnetism , single domain , magnetic domain , materials science , saturation (graph theory) , magnetic field , domain wall (magnetism) , conductivity , electrical resistivity and conductivity , physics , mathematics , quantum mechanics , combinatorics
Abstract The dependence of the conductivity and the magnetoresistance of a multi‐domain metallic ferromagnet on the magnetization when current flows along a domain wall is studied. The expression for the conductivity is obtained as function of x ‐coordinate which is normal to the domain wall plane. It is shown that the region of current localization in a compensated ferromagnet has a size in the x ‐coordinate of the order of the cyclotron radius near a single domain wall and becomes of the order of the decreasing domain width under magnetization. The magnetoresistance sharply increases in an external magnetic field near the saturation region. A comparison is made with the experimental data on the magnetoresistance of a ferromagnet with domain structure. It is shown that the appearance of nuclei of reverse‐magnetized domains leads to a resistance drop in the beginning of the magnetization process.