FERROMAGNETIC ANTIRESONANCE TRANSMISSION THROUGH SUPERMALLOY AT 24 GHZ

The magnetic field dependence of the transmission of 24 GHz radiation through ferromagnetic plates of Supermalloy approximately 10** minus **2 cm thick has been investigated. The results have been interpreted using a theory which combines Maxwell's equations and the equation of motion for the magnetization, and which includes the possibility of the external magnetic field lying at any angle with respect to the specimen normal. The results of the measurements on four discs of Supermalloy at 1 degree C were very consistent. The possibility of using transmission experiments on thinner specimens to study exchange and surface pinning of the magnetization is also discussed.