MAGNETIC PERMEABILITY FOR EXCHANGE-SPRING MAGNETS : APPLICATION TO FE/SM-CO
作者： R. J. Astalos , R. E. Camley
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摘要: We investigate the properties of dynamic permeability for a layered structure composed ferromagnet with low anisotropy coupled to high anisotropy. The small number layers (200) can be directly calculated numerically few approximations in long-wavelength limit. For larger structures we obtain analytic forms which are appropriate weak-coupling Our results give resonance frequency as function thickness two materials, interface and bulk exchange fields, each material. find that significant shifts frequency, on order 40 GHz, obtained only reduction strength resonance. This important high-frequency signal-processing devices, calculate filter based Fe/Sm-Co
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