Determination of intrinsic coercivity distributions in aligned assemblies of uniaxial SmCo₅ and LaCo₅ particles

Abstract

A simple method of determining intrinsic coercivity distributions in aligned assemblies of uniaxial particles is given. It is shown that the measured intrinsic coercivity, H_c, is not a suitable parameter for comparison with the theoretical estimates. The coercivity, H,., and the remanence coercivity, HR, of both the intermetallic compounds SmCo₅, and LaCo₅, show a strong linear temperature dependence. Both parameters increase as the tempera-ture is decreased.

The results show that reliable comparisons of the observed intrinsic coer-civities and the theoretical estimates must be made using the coercivity distributions obtained at the lowest possible temperatures.