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@ARTICLE{Stoll:302017,
      author       = {Stoll, Hermann and Noske, Matthias and Weigand, Markus and
                      Richter, Kornel and Krüger, Benjamin and Reeve, Robert M.
                      and Hänze, Max and Adolff, Christian F. and Stein,
                      Falk-Ulrich and Meier, Guido and Kläui, Mathias and
                      Schütz, Gisela},
      title        = {{I}maging {S}pin {D}ynamics on the {N}anoscale {U}sing
                      {X}-{R}ay {M}icroscopy},
      journal      = {Frontiers in Physics},
      volume       = {3},
      issn         = {2296-424X},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {PUBDB-2016-03060},
      pages        = {.},
      year         = {2015},
      abstract     = {The dynamics of emergent magnetic quasiparticles, such as
                      vortices, domain walls and bubbles are studied by scanning
                      transmission X-ray microscopy (STXM), combining magnetic
                      (XMCD) contrast with about 25nm lateral resolution as well
                      as 70 ps time resolution. Essential progress in the
                      understanding of magnetic vortex dynamics is achieved by
                      vortex core reversal observed by sub-GHz excitation of the
                      vortex gyromode, either by ac magnetic fields or spin
                      transfer torque. The basic switching scheme for this vortex
                      core reversal is the generation of a vortex-antivortex pair.
                      Much faster vortex core reversal is obtained by exciting
                      azimuthal spin wave modes with (multi-GHz) rotating magnetic
                      fields or orthogonal monopolar field pulses in the x and y
                      direction, down to 45 ps in duration. In that way
                      unidirectional vortex core reversal to the vortex core
                      “down” or “up” state only can be achieved with
                      switching times well below 100 ps. Coupled modes of
                      interacting vortices mimic crystal properties. The
                      individual vortex oscillators determine the properties of
                      the ensemble, where the gyrotropic mode represents the
                      fundamental excitation. Byself-organized state formation we
                      investigate distinct vortex core polarization configurations
                      and understand these eigenmodes in an extended Thiele model.
                      Analogies with photonic crystals are drawn. Oersted fields
                      and spin-polarized currents are used to excite the dynamics
                      of domain walls and magnetic bubble skyrmions. From the
                      measured phase and amplitude of the displacement of domain
                      walls we deduce the size of the non-adiabatic spin-transfer
                      torque. For sensing applications, the displacement of domain
                      walls is studied and a directcor relation between domain
                      wall velocity and spin structure is found. Finally the
                      synchronous displacement of multiple domain walls using per
                      pendicular field pulses is demonstrated as a possible
                      paradigm shift for magnetic memory and logic applications.},
      cin          = {MPSD},
      ddc          = {530},
      cid          = {I:(DE-H253)MPSD-20120731},
      pnm          = {899 - ohne Topic (POF3-899) / MAGWIRE - Magnetic Nanowires
                      for High Density Non Volatile Memories (257707) / WALL -
                      Controlling domain wall dynamics for functional devices
                      (608031) / MASPIC - Spin currents in magnetic nanostructures
                      (208162)},
      pid          = {G:(DE-HGF)POF3-899 / G:(EU-Grant)257707 /
                      G:(EU-Grant)608031 / G:(EU-Grant)208162},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000387176600001},
      doi          = {10.3389/fphy.2015.00026},
      url          = {https://bib-pubdb1.desy.de/record/302017},
}