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@PHDTHESIS{Aldarawsheh:1032288,
      author       = {Aldarawsheh, Amal},
      title        = {{A}b initio investigation of intrinsic antiferromagnetic
                      solitons},
      volume       = {286},
      school       = {Duisburg-Essen University},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2024-06127},
      isbn         = {978-3-95806-785-1},
      series       = {Reihe Schlüsseltechnologien / Key Technologies},
      pages        = {xv, 164},
      year         = {2024},
      note         = {Dissertation, Duisburg-Essen University, 2024},
      abstract     = {The field of spintronics is poised to transform technology
                      with faster, more efficient, and energy-saving devices by
                      exploring magnetic nanostructures for miniaturization. This
                      thesis uses a multi-scale modeling approach, combining
                      density functional theory and atomistic spin dynamics to
                      study topological antiferromagnetic (AFM) spin-swirling
                      textures in thin films. These textures are seen as ideal
                      dynamic bits for information transmission and storage,
                      offering advantages over ferromagnetic (FM) solitons. While
                      progress has been made in synthetic AFM multilayers, the
                      observation of intrinsic AFM solitons within film geometry
                      remains elusive. The thesis predicts a realistic combination
                      of ultrathin films capable of hosting a variety of intrinsic
                      topological AFM solitons with unique properties, exploring
                      their emergence mechanisms, stability, response to stimuli,
                      and dynamics. In our study, we choose transition metal
                      layers that are expected to be AFM such as Cr and Mn,
                      interfaced with Ir(111) surface, to investigate the
                      formation of AFM solitons. We predict the emergence of
                      intrinsic single and, surprisingly, interchained AFM
                      skyrmions in the rowwise AFM (RW-AFM) ground state of a Cr
                      layer on PdFe/Ir(111) surface. The stabilization mechanisms
                      involve Heisenberg exchange interactions,
                      Dzyaloshinskii-Moriya interactions, and magnetocrystalline
                      anisotropy. The energy barriers and the overlap of AFM
                      skyrmions are also explained. Then, we take a step further
                      by developing a generic atomistic spin model with the
                      minimum magnetic interactions required to stabilize those
                      AFM skyrmions. This model enhances the understanding of the
                      complex phase behavior of AFM skyrmions, showing their
                      sensitivity to diverse magnetic interactions and external
                      magnetic fields. When Cris replaced with a Mn layer, a new
                      type of AFM solitons, frustrated multi-meronic textures such
                      as hexa-merons and tri-merons, are observed in different
                      configurations of Mn based systems. We delve into the
                      mechanisms underlying their emergence, investigate their
                      properties and how different topological charges influence
                      their response to external magnetic fields. The study also
                      explores the dynamics of AFM skyrmions under the influence
                      of a spinpolarized current-perpendicular-to-plane.
                      Anisotropic skyrmion Hall effect is observed, resulting from
                      the elliptical shape of these AFM skyrmions. Additionally,
                      the interaction between FM and AFM skyrmions influences the
                      trajectories of AFM skyrmions, creating a complex hybrid
                      interaction profile. Finally, we propose a bottom-up
                      approach for the construction of topological magnetic
                      textures in diluted structures made of Cr, Mn or Fe adatoms
                      on Nb(110) surface and demonstrate the manifestation of a
                      rich set of topological spin-textures of FM and AFM nature.},
      cin          = {PGI-1},
      cid          = {I:(DE-Juel1)PGI-1-20110106},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      doi          = {10.34734/FZJ-2024-06127},
      url          = {https://juser.fz-juelich.de/record/1032288},
}