A New Grain Size and Volume Fraction Dependence of Coercive Field in Fe_(58)Co_(25)Nb_7Cu_1B_9 Alloy

摘要

For the system of soft magnetic nanocrystalline materials a new volume fraction and grain size dependence of coercive field is derived under the frame work of the Neel's theory of domain wall pinning. Derived equation is applied to partially devitrified Fe_(58)Co_(25)Nb_7Cu_1B_9 alloy revealing its importance from the point of view of experimental verification of the grain size and volume fraction dependence of coercive field for class of magnetic materials in which inter granular distance is comparable to the average grain diameter.