title: Magnetic imaging by x-ray holography using extended references.
abstract: We demonstrate magnetic lensless imaging by Fourier transform holography using extended references. A narrow slit milled through an opaque gold mask is used as a holographic reference and magnetic contrast is obtained by x-ray magnetic circular dichroism. We present images of magnetic domains in a Co/Pt multilayer thin film with perpendicular magnetic anisotropy. This technique holds advantages over standard Fourier transform holography, where small holes are used to define the reference beam. An increased intensity through the extended reference reduces the counting time to record the farfield diffraction pattern. Additionally it was found that manufacturing narrow slits is less technologically demanding than the same procedure for holes. We achieve a spatial resolution of ∼30 nm, which was found to be limited by the sample period of the chosen experimental setup.
authors.affiliation: School of Physics and Engineering, University of Exeter, Stocker Road, Exeter EX4 4QL, UK. tad203@ex.ac.uk
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Duckworth
authors.forename: Feodor
authors.initials: F
authors.lastname: Ogrin
authors.forename: Sarnjeet S
authors.initials: SS
authors.lastname: Dhesi
authors.forename: Sean
authors.initials: S
authors.lastname: Langridge
authors.forename: Amy
authors.initials: A
authors.lastname: Whiteside
authors.forename: Thomas
authors.initials: T
authors.lastname: Moore
authors.forename: Guillaume
authors.initials: G
authors.lastname: Beutier
authors.forename: Gerrit
authors.initials: G
authors.lastname: van der Laan