Magnetic Properties of the Amorphous Fe-Zr-B-Ni Alloys Annealed below the Crystallization Temperature

Abstract

We have studied the magnetic properties of amorphous Fe83？xZr7B10Nix alloys annealed below the crystallization temperature. Such materials are considered to have a potential for high frequency core material applications because of possibilites of obtaining high effective permeability and low coercive force. The addition of Ni content of approximately 0.5？1.5 at.% was found to be effective in improving the soft magnetic properties. The temperature dependence of magnetization measured by a SQUID magnetometer are found to be in good agreement with the spin wave theory. The spectroscopic splitting g values obtained by ferromagnetic resonance(FMR) experiments increase with increasing Ni content. The values of the spin wave stiffness increases from 62.7 meV ？2 to 95.2 meV ？2 with increasing the concentration of Ni. From these experimental results, the range of the exchange interaction are deduced. ？ 1995 IEEE