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@ARTICLE{Wang:893891,
      author       = {Wang, Fangzhou and Bürgler, Daniel E. and Adam, Roman and
                      Parlak, Umut and Cao, Derang and Greb, Christian and
                      Heidtfeld, Sarah and Schneider, Claus M.},
      title        = {{M}agnetization relaxation dynamics in [ {C}o / {P}t ] 3
                      multilayers on pico- and nanosecond timescales},
      journal      = {Physical review research},
      volume       = {3},
      number       = {3},
      issn         = {2643-1564},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2021-02903},
      pages        = {033061},
      year         = {2021},
      abstract     = {We experimentally investigated magnetization relaxation
                      dynamics in the largely unexplored time window extending
                      from few picoseconds up to two nanoseconds following
                      femtosecond laser pulse excitation. We triggered
                      magnetization dynamics in [Co(0.4nm)/Pt(0.7nm)]3 multilayers
                      and measured the resulting magneto-optic response by
                      recording both transient hysteresis loops as well as
                      transients of magnetization dynamics. We observe that the
                      coercive field of the sample is still strongly suppressed
                      even ∼1 ms after the laser excitation, which is three
                      orders of magnitude longer than the recovery time of the
                      magnetization amplitude. In addition, we succeeded to fit
                      the magnetization relaxation data in the entire
                      experimentally observed time window by considering two
                      phenomenological time constants τ∗f and τ∗s describing
                      fast (ps) and slow (ns) magnetization relaxation processes,
                      respectively. The fits of the data suggest a magnetic field
                      dependent relaxation slowdown beyond 100 ps after
                      excitation. We observe an explosion of the τ∗f and τ∗s
                      values when the magnetization is completely quenched and
                      relaxes intrinsically in the absence of an external magnetic
                      field. We interpret the phenomenological time constants
                      τ∗f and τ∗s using an intuitive physical picture based
                      on the Landau-Lifshitz-Bloch model and numerical solutions
                      of the extended three-temperature model [Shim et al., Sci.
                      Rep. 10, 6355 (2020)].},
      cin          = {PGI-6},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {5214 - Quantum State Preparation and Control (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5214},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000674633500008},
      doi          = {10.1103/PhysRevResearch.3.033061},
      url          = {https://juser.fz-juelich.de/record/893891},
}