Abstract
Magnetic multilayers consisting of alternating layers of polycrystalline Fe and Ni were investigated by spin wave resonance experiments at room temperature. Nonpropagating surface spin wave modes, as well as standing volume modes, could be observed in the perpendicular field configuration. The appearance of the surface modes is connected with the surface anisotropy at the bottom and the top layers of the structure. The experimental SWR spectra have been compared with the results of calculations. Values of the surface anisotropy, the effective spin wave stiffness constant, and the effective magnetization of the multilayered structure were deduced from the measured spectra for as-prepared and annealed samples. The results are compared with those obtained by torque measurements.
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