Edge saturation fields and dynamic edge modes in ideal and non-ideal magnetic film edges

Abstract

This paper describes modeling of the micromagnetic behavior near edges of ferromagnetic thin films when uniform fields are applied in plane and perpendicular to the edge. The properties of magnetic film edges can determine the behavior of small patterned elements, either by proximity in the smallest elements or because reversal often nucleates at an edge in larger elements. Three classes of nonideal edges are also modeled: tilted edge surfaces, reduced spontaneous magnetization near the edge, and surface anisotropy on the edge surface.