Domain wall mobility in rapidly solidified ultrathin amorphous wires

Abstract

Results on the complex relation between magnetic domain wall mobility and magnetic anisotropy in rapidly solidified amorphous submicron wires and nanowires are reported. A distinctly nonlinear dependence of the domain wall mobility on wire diameter has been found in the case of positive magnetostrictive wires, whilst the same dependence is monotonic in the case of nearly zero magnetostrictive ones. This significant difference has been proven to originate in the different types of magnetic anisotropy, which exist in thin amorphous wires having different signs and magnitudes of the magnetostriction.