Journal Article partially coherent light kinoform lens mutual optical intensity synchrotron beamline Ni-based superconductors Research Support, Non-U.S. Gov't antiferromagnetism aperture electrochemical intercalation energy resolution exchange bias fast polarization switching ferromagnetism modulation geometrical optics interlayer coupling magnetic order nickelates orbital hybridization phase distribution soft X-ray magnetic circular dichroism beamline synchrotron radiation synchrotron radiation beamline tandem twin elliptically polarized undulators two-dimensional mirrors vdW magnetic materials wave optics