Surface magnetic structures in amorphous ferromagnetic microwires

The spatial period of magnetization perturbations that occur near the surface of magnetic nanotube or nanowire under the influence of surface magnetic anisotropy is determined by means of numerical simulation as a function of the sample geometry and material parameters. The surface magnetization distribution obtained is then used to estimate the period of the surface magnetic texture in amorphous microwire of several micrometers in diameter by means of appropriate variational procedure. The period of the surface magnetic texture in amorphous microwire is found to be significantly smaller than the wire diameter. •Magnetic structure may arise near the magnetic nanotube surface under the influence of surface magnetic anisotropy.•The period of the surface magnetization pattern is calculated as a function of the sample geometry.•Similar magnetic structure may exist in amorphous microwire of several micrometers in diameter.•The period of the surface magnetic structure in amorphous wire is found to be significantly smaller than the wire diameter.