Figure 3: Demonstration that the fringe-field effect is a result of magnetic, rather than electrical coupling.

MC and MEL responses of an organic fringe-field device where the magnetic film is electrically isolated from the organic device by insertion of a SiO2 layer between them. This control experiment is important for establishing the correct interpretation of the data (see text), but results in a greater distance between magnetic film and organic device, leading to a smaller coupling between the two and a smaller fringe-field effect.