SPIN-WAVE STIFFNESS CONSTANTS OF AMORPHOUS FE-ZR-B-NB ALLOYS

Abstract

We have investigated the magnetic properties of amorphous Fe83-xZr7B10Nbx alloys, which possess potentially interesting properties as high frequency core materials due to its high effective Permeability and low coercive force. The temperature dependence of magnetization were measured with a SQUID magnetometer and g values were deduced from a ferromagnetic resonance (FMR) experiment. The low temperature magnetization curve is found to obey Bloch's T3/2 law. From these experimental results, spin wave stiffness constants were calculated.