Influence of stress condition on initiation of magnetostriction in grain oriented silicon steel

It is commonly known that the magnetostriction of grain oriented silicon steel for electric transformers, is strongly influenced by applied stress on the steel as well as coating stress of the steel and is dominated exclusively by the formation of 90/spl deg/ domain walls. A new concept on a condition for the formation of 90/spl deg/ domain wall considers the total elastic energy which consists of both strain elastic energy and magnetoelastic energy in axes of easy magnetization of Goss texture {110} <001>. It is proposed that 90/spl deg/ domain wall is formed under the condition that the total elastic energies in the three easy axes of magnetization are related by the expression Ex([100])>