title: Three-dimensional, spin-resolved structure of magnetic vortex and antivortex states in patterned Co films using scanning ion microscopy with polarization analysis.
abstract: Scanning ion microscopy with polarization analysis is utilized for three-dimensional spin mapping of the surface magnetization (SM) of circular Co dots created in situ by focused ion beam etching of 30 nm thin Co/Si(100) films. From 3D scanning ion microscopy with polarization analysis spin maps, direct evidence is found for the existence of vortex-antivortex states with in-plane circular or hyperbolic SM components and a wide core with perpendicular SM components which oscillate in the outer region and become zero.
authors.affiliation: Department of Physics and Astronomy, Rice Quantum Institute and Center for Nanoscience and Technology, Rice University, Houston, Texas 77251, USA.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.forename: Carl
authors.initials: C
authors.lastname: Rau