title: Quantitative spin polarization analysis in photoelectron emission microscopy with an imaging spin filter.
abstract: Using a photoelectron emission microscope (PEEM), we demonstrate spin-resolved electron spectroscopic imaging of ultrathin magnetic Co films grown on Cu(100). The spin-filter, based on the spin-dependent reflection of low energy electrons from a W(100) crystal, is attached to an aberration corrected electrostatic energy analyzer coupled to an electrostatic PEEM column. We present a method for the quantitative measurement of the electron spin polarization at 4 × 10³ points of the PEEM image, simultaneously. This approach uses the subsequent acquisition of two images with different scattering energies of the electrons at the W(100) target to directly derive the spin polarization without the need of magnetization reversal of the sample.
authors.affiliation: Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany. tusche@mpi-halle.mpg.de
authors.forename: Christian
authors.initials: C
authors.lastname: Tusche
authors.forename: Martin
authors.initials: M
authors.lastname: Ellguth
authors.forename: Alexander
authors.initials: A
authors.lastname: Krasyuk
authors.forename: Aimo
authors.initials: A
authors.lastname: Winkelmann
authors.forename: Dmytro
authors.initials: D
authors.lastname: Kutnyakhov
authors.forename: Pavel
authors.initials: P
authors.lastname: Lushchyk
authors.forename: Katerina
authors.initials: K
authors.lastname: Medjanik
authors.forename: Gerd
authors.initials: G
authors.lastname: Schönhense
authors.forename: Jürgen
authors.initials: J
authors.lastname: Kirschner
keywords: Electron microscopy; Electron spin polarization analysis; Magnetic imaging; Photoemission