On the Ferromagnetic Resonance in Nickel and Supermalloy

Abstract

Both the real and imaginary part of the high frequency permeability of flat specimens of nickel and supermalloy have been investigated at 9030 mc/sec. and 24400 mc/sec., with a constant field $H_0$ parallel to the plane of the specimen. For the higher frequency, experiments were extended beyond the Curie point (358°C for nickel and about 400°C for supermalloy). The decrease in saturation magnetization causes the maximum and the minimum of ferromagnetic absorption to shift toward higher field strengths. The $g$ factor is independent of temperature within the limit of error (2 percent); $g=2.12\mathrm{}$ for supermalloy and $g=2.20\mathrm{}$ for nickel.