Influence of Shell Thickness on Magnetostatic Properties of CoFeSiB/CoNi Microwires

The magnetic properties of biphase microwire which composed of CoFeSiB soft magnetic wire, Pyrex glass and Co
₉₀
Ni
₁₀
hard magnetic shell are described in this paper. By analyzing the magneto resistance spectrum and the effect of outer shell thickness on ferromagnetic resonance were researched. With the thickness of magnetic shell increasing, the anisotropy field also increased for the enhanced demagnetizing field in the shell. The characteristics of the magnetic static coupled biphase system have great potential in the study of magnetic sensors.