Temperature dependence of the transmission of gigahertz sound through Invar

Abstract

The temperature dependence of the transmission of 9-GHz sound waves through polycrystalline samples of the Invar alloy Fe63Ni36Mn0.4Si0.2 has been measured over the temperature interval 77–300 K. Configurations in which the applied, static magnetic field as in the plane of the sample but either parallel of perpendicular to the incident microwave magnetic field were studied. The experimental results are compared to transmission calculations including both magnetoelastically and electromagnetically excited sound.