Open AccessImaging the in-plane magnetization in a Co microstructure by Fourier transform holography
Author(s) -
C. Tieg,
Robert Frömter,
Daniel Stickler,
S. Hankemeier,
A. Kobs,
S. Streit-Nierobisch,
Christian Gutt,
G. Grübel,
Hans Peter Oepen
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.027251
Subject(s) - optics , fourier transform , holography , magnetic domain , materials science , magnetization , opacity , magnetic circular dichroism , physics , nuclear magnetic resonance , magnetic field , spectral line , quantum mechanics , astronomy
We report on experiments using Fourier transform holography to image the in-plane magnetization of a magnetic microstructure. Magnetic sensitivity is achieved via the x-ray magnetic circular dichroism effect by recording holograms in transmission at off-normal incidence. The reference beam is defined by a narrow hole milled at an inclined angle into the opaque mask. We present magnetic domain images of an in-plane magnetized cobalt element with a size of 2 μm × 2 μm× 20 nm. The domain pattern shows a multi-vortex state that deviates from the simple Landau ground state.