Spin-wave resonance in Co/Pd magnetic multilayers and NiFe/Cu/NiFe three-layered films
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- Iskhakov, R.S., Shepeta, N.A., Stolyar, S.V. et al. Jetp Lett. (2006) 83: 28. doi:10.1134/S0021364006010073
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The spectrum of standing spin waves has been detected by the ferromagnetic resonance method in NiFe(740 Å)/Cu/NiFe(740 Å) three-layered film structure in the perpendicular configuration for the copper thickness dCu ≤ 30 Å. At thicknesses dCu > 30 Å, the resonance absorption curve is a superposition of two spinwave resonance spectra from individual ferromagnetic NiFe layers. For Co/Pd multilayer films, united spinwave responance spectra have also been observed at thicknesses of the paramagnetic palladium layer up to dPd < 30 Å. The partial exchange stiffness has been calculated for a spin wave propagating across the Pd layer (APd = 0.1 × 10−6 erg/cm). This value is always positive (up to the critical thickness of the palladium interlayer dPd < dc) or equal to zero (dPd > dc).