Aharonov Bohm oscillation in a multi-domain ferromagnetic Fe19Ni81 ring

The magnetoresistance of a ferromagnetic Fe19Ni81 ring with View the MathML source in inner diameter and View the MathML source in outer diameter was measured at View the MathML source and View the MathML source. When the magnetic field is applied to the ring, the magnetoresistance exhibits a periodic oscillation due to the Ahoronov Bohm effect in both a single domain configuration and a multi-domain configuration. This indicates that the interference effect of a conduction electron in the submicron ferromagnet subsists even in the strong modulation of local magnetization.