The magnetoelastic interaction of dislocations and ferromagnetic domain walls in iron and nickel

Abstract

A theory is developed which permits the magnetoelastic interaction of domain walls and dislocations to be computed as a function of their relative separation. The method corresponds to a two constant theory of magnetostriction and is applied to more than sixty cases for iron and nickel. The calculations indicate that dislocations in iron interact more strongly by as much as an order of magnitude with 180 deg walls than with 90 deg Type B walls,i.e., walls with normal component of magnetization but equal zero. The situation for nickel is just the opposite. The results are discussed in terms of the effects of domain walls on individual dislocations and the effect of extensive arrays of dislocations on magnetic properties.