Abstract
Forces acting on a magnetic bubble near ion milled step-like changes in magnetic film thickness are investigated in a (110)-oriented (GdY) 3 (FeMnGa) 5O 12 — garnet film with orthorhombic anisotropy. An experiment is described in which these forces are measured and compared to those resulting from the step-related demagnetizing field and magnetoelastic effects. Local thickness variations can substantially influence the minimum drive field in the immediate vicinity of the edges. The use of etched microstructures in magnetic films to stabilize magnetic domains at well-defined placed induce stress fields which are comparable with the edge-induced stress of overlying patterned metallizations.
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