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@PHDTHESIS{Gottlob:202697,
      author       = {Gottlob, Daniel},
      title        = {{S}pin-reorientation transition in epitaxial
                      {N}i$_{x}${P}d$_{1-x}$ fims on {C}u(001): a microscopic
                      analysis},
      volume       = {104},
      school       = {Universität Duisburg},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2015-04881},
      isbn         = {978-3-95806-049-4},
      series       = {Schriften des Forschungszentrums Jülich. Reihe
                      Schlüsseltechnologien / Key Technologies},
      pages        = {X, 134 S.},
      year         = {2015},
      note         = {Universität Duisburg, Diss., 2014},
      abstract     = {This thesis deals with the spin-reorientation transition
                      (SRT) usually observed at moderate thicknesses of 35-70ML in
                      Ni and NiPd thin films on Cu(001) and the connectionbetween
                      domain formation and anisotropy. The intrinsic properties of
                      the magnetic anisotropy in thin lms and native states,
                      characterized by their domain formations, are of high
                      interest in the framework of spintronics. Thin lm epitaxial
                      systems are used to approach a model system behavior,
                      therefore Cu(001) single crystals are prepared in a high
                      surface quality and epitaxial Ni and NiPd films were grown
                      in-situ by molecular beam epitaxy. The domain formations are
                      studied on demagnetized films by utilizing the x-ray
                      magnetic circular dichroism on a synchrotron based, energy
                      filtered, and aberration corrected x-ray photoemission
                      electron microscope. Synchrotron light is used as a
                      multi-purpose tool with element selectivity and high flux,
                      enabling one to determine the magnetization direction by
                      dipole selection rule geometries. A lateral change of the
                      effective anisotropy was achieved by employing a wedged film
                      geometry, resulting in unique continuous measurements on the
                      perpendicular magnetic anisotropy (PMA) area including the
                      SRT area (0-100 ML) in Ni/Cu(001). A new domain formation of
                      rectangularly ordered domains with domain walls aligning
                      along the <110>-axes was found in the vicinity of the SRT
                      and is attributed to the increasing influence of planar
                      anisotropies, found to be in a very good agreement with
                      theoretical models and simulations. The domain formation
                      throughout the SRT is observed for the first time and
                      identified as a canted state transition. Ni-like NiPd films
                      were grown in order to vary the film-strain, the major
                      driving parameter for the PMA and SRTs, yielding domain
                      formations of similar characteristics up to
                      Pd-concentrations of $12\%.$ The behavior of NiPd films
                      exhibiting compressive strain was investigated, verifying
                      theoretical predictions that no SRT or PMA can be found
                      throughout the whole thickness range of 0-60 ML. Offsetting
                      the elemental wedges made it possible to observe
                      acomposition-driven SRT. While the varied parameter range
                      results in a strongly varied domain formation, in-plane
                      anisotropy influence and a canted state could be found
                      again. In the framework of the observed domain formations in
                      the microscopic setup, a discussion of the T$_{c}$ drop at
                      the SRT concludes this thesis. While being frequently
                      reported, we could not find any hints for its existence in
                      various examined SRTs.},
      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/202697},
}