Abstract
The spin wave resonance (SWR) at 9.2 GHz has been investigated in single layer films (d⋍200 nm) and multi layer films of FeNi. The variation of the spin wave parameters as a function of Ni concentration is determined at room temperature. For a Fe20Ni80 single layer and a Fe65Ni35 multi layer the temperature dependence has been studied in the range of 4 to 300 K. Besides, the SWR has been measured in annealed bulk samples of Fe63Ni37 at 9.2 and 33.8 GHz as a function of temperature. From the SWR spectra of the bulk and film samples quantitative values of the effective magnetization, the g factor, and the exchange stiffness parameter have been determined.
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