White Paper: The Effect Of Stress On Initial Permeability In Ferrite Cores

Many of today's modern electronic circuits are built around magnetic components. A principal player in the design of these magnetic components is the ferrite core. Ferrite cores come in many different shapes and sizes and are made from many different raw materials. The magnetic properties of ferrite materials depend on many things. Such characteristics as the size of the grains created, typically between 5 and 40 um, and the sintering (firing) processes strongly determine the properties of the final product. The purpose of this article is to discuss in particular the effects on initial permeability (µi), thus inductance, which are a result of the various construction techniques and environmental conditions encountered.