Abstract:Gyroremanent magnetization (GRM) has previously been studied in connection with the well-known technique of ac demagnetization, which is used extensively in rock magnetism, palaeomagnetism and magnetic materials research. The "normal" GRM effect was explained by Stephenson in 1980, but recently a "reversed" GRM was obtained in a CrO 2 particle system by Madsen. We have studied samples of -Fe 2 O 3 particles (commercial magnetic recording tapes) and have identified samples with both "normal" and "reversed" GRM.… Show more
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