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The magneto-optical readout properties of Ba-ferrite particulate media recorded by a magnetic head were investigated. Although the readout wave form reproduced using the Faraday effect contained a large noise component, the wave form with same bit period as that of the recorded signal was obtained. The domain pattern observed using a polarized microscope shows obscure boundaries between adjacent magnetized areas. The origin of noise is discussed from the standpoint of dispersion and the refractive index in particulate media.
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Kishimoto et al. (1995) studied this question.
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