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@ARTICLE{Holl:888590,
      author       = {Holl, Christian and Knol, Marvin and Pratzer, Marco and
                      Chico, Jonathan and Fernandes, Imara Lima and Lounis, Samir
                      and Morgenstern, Markus},
      title        = {{P}robing the pinning strength of magnetic vortex cores
                      with sub-nanometer resolution},
      journal      = {Nature Communications},
      volume       = {11},
      number       = {1},
      issn         = {2041-1723},
      address      = {[London]},
      publisher    = {Nature Publishing Group UK},
      reportid     = {FZJ-2020-05046},
      pages        = {2833},
      year         = {2020},
      abstract     = {Understanding interactions of magnetic textures with
                      defects is crucial for applications such as racetrack
                      memories or microwave generators. Such interactions appear
                      on the few nanometer scale, where imaging has not yet been
                      achieved with controlled external forces. Here, we establish
                      a method determining such interactions via spin-polarized
                      scanning tunneling microscopy in three-dimensional magnetic
                      fields. We track a magnetic vortex core, pushed by the
                      forces of the in-plane fields, and discover that the core (~
                      104 Fe-atoms) gets successively pinned close to single
                      atomic-scale defects. Reproducing the core path along
                      several defects via parameter fit, we deduce the pinning
                      potential as a mexican hat with short-range repulsive and
                      long-range attractive part. The approach to deduce defect
                      induced pinning potentials on the sub-nanometer scale is
                      transferable to other non-collinear spin textures,
                      eventually enabling an atomic scale design of defect
                      configurations for guiding and reliable read-out in
                      race-track type devices.},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) /
                      First-principles investigation of single magnetic
                      nano-skyrmions $(jias17_20190501)$ / First-principles
                      investigation of single magnetic nano-skyrmions
                      $(jara0189_20190501)$},
      pid          = {G:(DE-HGF)POF3-142 / $G:(DE-Juel1)jias17_20190501$ /
                      $G:(DE-Juel1)jara0189_20190501$},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:32504062},
      UT           = {WOS:000540308600001},
      doi          = {10.1038/s41467-020-16701-y},
      url          = {https://juser.fz-juelich.de/record/888590},
}