Remanent magnetisation and demagnetisation measurements on particulate recording media

Abstract

The static and dynamic remanence curves of particulate media were studied experimentally in order to clarify the effect of interparticle interactions. The technique is based on a comparison of the remanence curves using as a guide relations derived by consideration of the switching field distribution. Measurements were made using a vibrating-sample magnetometer on samples of tape containing gamma -Fe/sub 2/O/sub 3/ particles. The results show a strong dependence of magnetization reversal on the magnetic state, which is consistent with the effects of interactions.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>