INFLUENCE OF EXCHANGE-COUPLED ANISOTROPIES ON SPIN-WAVE FREQUENCIES IN MAGNETIC LAYERED SYSTEMS - APPLICATION TO CO COO/

Recent experiments in Co/CoO layered structures have shown a huge effe ct where the frequency of the lowest spin wave in the ferromagnetic Co has been doubled, apparently due to the interaction with antiferromag netic CoO. We explore a microscopic model for spin waves in such coupl ed structures which can explain such an effect. In this model a magnet ic material with a significant anisotropy is exchange coupled to a dif ferent magnetic material with minimal anisotropy. The shift in the spi n-wave frequency increases as either the anisotropy or interface excha nge is increased.