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@ARTICLE{Bauer:16692,
      author       = {Bauer, D. and Mavropoulos, Ph. and Lounis, S. and Blügel,
                      S.},
      title        = {{T}hermally activated magnetization reversal in monatomic
                      magnetic chains on surfaces studied by classical atomistic
                      spin-dynamics simulations},
      journal      = {Journal of physics / Condensed matter},
      volume       = {23},
      issn         = {0953-8984},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PreJuSER-16692},
      pages        = {394204},
      year         = {2011},
      note         = {We are grateful to Dr Riccardo Hertel for discussions on
                      the physics of magnetization dynamics, Dr Laszlo Szunyogh
                      for discussions on the form of the anisotropy tensor in
                      surface-supported chains, and Professor Christian Schroder
                      for discussions on the methodology of atomistic spin
                      dynamics. This work has been supported in part by FP7 EU-ITN
                      FANTOMAS. SL wishes to thank the Alexander von Humboldt
                      Foundation for a Feodor Lynen Fellowship and also Professor
                      D L Mills for hospitality at the UC-Irvine.},
      abstract     = {We analyse the spontaneous magnetization reversal of
                      supported monatomic chains of finite length due to thermal
                      fluctuations via atomistic spin-dynamics simulations. Our
                      approach is based on the integration of the Landau-Lifshitz
                      equation of motion of a classical spin Hamiltonian in the
                      presence of stochastic forces. The associated magnetization
                      lifetime is found to obey an Arrhenius law with an
                      activation barrier equal to the domain wall energy in the
                      chain. For chains longer than one domain wall width, the
                      reversal is initiated by nucleation of a reversed
                      magnetization domain primarily at the chain edge followed by
                      a subsequent propagation of the domain wall to the other
                      edge in a random-walk fashion. This results in a linear
                      dependence of the lifetime on the chain length, if the
                      magnetization correlation length is not exceeded. We studied
                      chains of uniaxial and triaxial anisotropy and found that a
                      triaxial anisotropy leads to a reduction of the
                      magnetization lifetime due to a higher reversal attempt
                      rate, even though the activation barrier is not changed.},
      keywords     = {J (WoSType)},
      cin          = {IAS-1 / JARA-FIT / JARA-SIM / PGI-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)VDB1045 / I:(DE-Juel1)PGI-1-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:21921308},
      UT           = {WOS:000295035200006},
      doi          = {10.1088/0953-8984/23/39/394204},
      url          = {https://juser.fz-juelich.de/record/16692},
}