Induced moment due to perpendicular field cycling in trained exchange bias system

Depth-sensitive polarized neutron scattering in specular and off-specular mode has recently revealed that perpendicular field cycling brings about a modification in the interfacial magnetization of a trained exchange coupled interface. We show here by various model fits to our neutron reflectivity data that a restoration of the untrained state is not possible in the case of our polycrystalline multilayer specimen. This is due a magnetic moment at the interface induced only after perpendicular field cycling, changing the initial field-cooled state.