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@PHDTHESIS{Weier:190249,
author = {Weier, Christian},
title = {{R}esonant {M}agnetic {S}cattering {S}tudies using
{S}ynchrotron {R}adiation and {L}aser-{G}enerated {E}xtreme
{U}ltraviolet {L}ight},
volume = {105},
school = {Universität Duisburg},
type = {Dr.},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2015-03167},
isbn = {978-3-95806-052-4},
series = {Schriften des Forschungszentrums Jülich. Reihe
Schlüsseltechnologien / Key Technologies},
pages = {VII, 143 S.},
year = {2015},
note = {Universität Duisburg, Diss., 2015},
abstract = {In this thesis magnetic domain patterns of ferromagnetic
alloys are studied using resonant magnetic scattering (RMS).
For this purpose synchrotron radiation in the soft X-ray
range and laser-based extreme ultraviolet (XUV) light from a
laboratory light source are employed. The synchrotron
measurements give detailed information about the properties
of magnetic domains with nanometer precision and element
selectivity. These specialties allow investigations of
domain patterns of complex layered systems, including
FePd/CoPd bilayers or CoPd/Pd/NiFe trilayers. Time-resolved
experiments with visible laser radiation are conducted to
examine the laserinduced demagnetization of FePd/CoPd
bilayers, pointing out the influence of intense laser pulses
on the magnetic coupling of the two layers. This technique
is capable of tracing the temporal evolution of the
magnetization, nevertheless it cannot image nanometer-sized
magnetic domains due to the limited spatial resolution.
Consequently, a new approach is necessary to resolve domain
patterns and ultrafast magnetization dynamics at the same
time. This aim motivates the most important question
addressed in this thesis: whether a tabletop XUV light
source based on high-order harmonic generation (HHG) can be
used for RMS experiments on magnetic domain patterns. In
this context it is further shown, how intense laser exposure
causes permanent and reversible modifcations of the magnetic
nanostructure and the sample morphology. Finally, coherence
properties of the generated XUV radiation are examined,
using nonmagnetic scattering at grains and knife-edge
diffraction. The results obtained reveal the advantages and
limitations of HHG sources for applications which demand a
high light coherence.},
cin = {PGI-6},
cid = {I:(DE-Juel1)PGI-6-20110106},
pnm = {522 - Controlling Spin-Based Phenomena (POF3-522)},
pid = {G:(DE-HGF)POF3-522},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
url = {https://juser.fz-juelich.de/record/190249},
}