CESR observation using an amplitude-modulated microwave field

Abstract
Amplitude modulating the microwave field and monitoring delta Mz/ delta t by means of a coil coaxial to the static field and close to the sample, are shown to constitute an original technique for studying conduction electron spin resonance. A calculation of the line shape is derived for both cases of normal and anomalous skin effect. The method is shown to provide several favourable features when compared to conventional spectrometry. Experiments on lithium are reported as an example, and results are compared to theoretical calculations.