EASY-AXIS DISTRIBUTION IN 2-DIMENSIONAL RECORDING MEDIA

In contrast to preceding methods valid only for noninteracting many-pa rticle assemblies, we describe a theory applicable to two-dimensional recording media, which includes interactions between particles through a mean-field model. Expressions are obtained for the angular dependen ce of magnetic remanences parallel and perpendicular to the applied fi eld. We define a quantity independent of interaction, the remanent mag netization direction, which provides a realistic distribution of easy axes. From this distribution, plus saturation squareness measurements, the interaction strength may be estimated. (C) 1995 American Institut e of Physics.