Observation of the volumetric spin wave absorption in a magnetic-superconductor structure

Temperature dependence of volumetric spin waves absorption in the composite layered structures, containing ferrite and YBaCuO thin films, is for the first time experimentally studied. Nonmonotonous behaviour of the absorption value and presence of the sharp maximum at T ∼ 130 K are determined. It is established that such a behaviour is connected with the change of the ratio between the wave length and effective screening length, depending on temperature. Within the range of T ≅ Tc the absorption does not show sharp jumps and monotonously diminishes by further temperature decrease, which is explained by essential influence of weak bonds between superconducting granules