The effects of radiation on ferrites

The effects of reactor exposures in the range
¹⁰¹⁶
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^{1018,/sup> fast neutrons per cm2 (square centimeter) on the magnetic properties of 16 polycrystalline ferrites and garnets are presented. Measured properties included coercive force, remanence, saturation induction, complex permeability, and FMR (ferromagnetic resonance) linewidth. It was found that the hysteresis properties and FMR linewidth were slightly affected by exposures of 1018 neutrons per cm2. Complex permeability was affected by exposures as small as 1016 neutrons per cm2. All of the observed changes were small.}