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@ARTICLE{Nepijko:19964,
      author       = {Nepijko, S.A. and Krasyuk, A. and Oelsner, A. and
                      Schneider, C.M. and Schonhense, G.},
      title        = {{Q}uantitative measurements of magnetic stray field
                      dynamics of {P}ermalloy particles in a photoemission
                      electron microscopy},
      journal      = {Journal of Microscopy},
      volume       = {242},
      reportid     = {PreJuSER-19964},
      pages        = {216 -220},
      year         = {2011},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {By example of a Permalloy particle (40 × 40 μm(2) size,
                      30 nm thickness) we demonstrate a procedure to
                      quantitatively investigate the dynamics of magnetic stray
                      fields during ultrafast magnetization reversal. The
                      measurements have been performed in a time-resolving
                      photoemission electron microscope using the X-ray magnetic
                      circular dichroism. In the particle under investigation, we
                      have observed a flux-closure-dominated magnetic ground
                      structure, minimizing the magnetic stray field outside the
                      sample. A fast magnetic field pulse introduced changes in
                      the micromagnetic structure accompanied with an incomplete
                      flux closure. As a result, stray fields arise along the
                      edges of domains, which cause a change of contrast and an
                      image deformation of the particles geometry (curvature of
                      its edge). The magnetic stray fields are calculated from a
                      deformation of the X-ray magnetic circular dichroism (XMCD)
                      images taken after the magnetic field pulse in a 1 ns
                      interval. These measurements reveal a decrease of magnetic
                      stray fields with time. An estimate of the lower limit of
                      the domain wall velocity yields about 2 × 10(3) m s(-1).},
      keywords     = {J (WoSType)},
      cin          = {PGI-6},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Microscopy},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:21155993},
      UT           = {WOS:000289163900012},
      doi          = {10.1111/j.1365-2818.2010.03472.x},
      url          = {https://juser.fz-juelich.de/record/19964},
}