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@ARTICLE{Pavelka:622851,
      author       = {Pavelka, Martin and Elhanoty, Mohamed and Wang, Ru-Pan and
                      Marotzke, Simon and Brenner, Guenter and Dziarzhytski,
                      Siarhei and Jana, Somnath and Engel, Dieter and van Korff
                      Schmisin, Clemens and Gupta, Deeksha and Vaskivskyi, Igor
                      and Amrhein, Tim and Thielemann-Kuehn, Nele and Weinelt,
                      Martin and Knut, Ronny and Roensch-Schulenberg, Juliane and
                      Schneidmiller, Evgeny Alexanrdovich and
                      Schuessler-Langeheine, Christian and Beye, Martin and
                      Pontius, Niko and Grånäs, Oscar and Duerr, Hermann},
      title        = {{F}emtosecond charge and spin dynamics in a
                      {C}o$_{50}${P}t$_{50}$ alloy},
      journal      = {Structural dynamics},
      volume       = {12},
      number       = {2},
      issn         = {2329-7778},
      address      = {Melville, NY},
      publisher    = {AIP Publishing LLC},
      reportid     = {PUBDB-2025-00531},
      pages        = {024303},
      year         = {2025},
      note         = {Add the grant:Deutsche Forschungsgemeinschaft (DFG)
                      Project-ID 328545488, TRR277},
      abstract     = {The use of advanced X-ray sources plays a key role in the
                      study of dynamic processes in magnetically ordered
                      materials. The progress in X-ray free electron lasers
                      enables the direct and simultaneous observation of the
                      femtosecond evolution of the electrons and spins through
                      transient X-ray absorption spectroscopy (XAS) and X-ray
                      magnetic circular dichroism (XMCD). Such experiments allow
                      us to resolve how the population of the valence states
                      evolves in magnetic solids upon optical excitation. Here, we
                      utilize the new FLASH2 helical afterburner undulator’s
                      circularly polarized ultrashort soft X-ray pulses from the
                      FLASH free-electron laser FLASH to study the femtosecond
                      dynamics of a laser-excited CoPt alloy at the Co L$_3$ edge.
                      We find a comparable demagnetization for lower electronic
                      excitation of Co 3d-states in CoPt compared to previous
                      measurements on CoPd. This points to a more efficient
                      demagnetization depending on orbital hybridization and
                      spin-orbit coupling between 3d and 4d or 5d elements in an
                      alloys and multilayers.},
      cin          = {DOOR ; HAS-User / FS-FLASH / FS-FLASH-B / MFL},
      ddc          = {500},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-FLASH-20140814
                      / I:(DE-H253)FS-FLASH-B-20160930 / I:(DE-H253)MFL-20120731},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G2 - FLASH (DESY) (POF4-6G2) / FS-Proposal:
                      F-20220710 (F-20220710) / FS-Proposal: F-20211728 EC
                      (F-20211728-EC) / 05K22KE2 - Messplatz für ultraschnelle
                      Spindynamik bei FLASH (BMBF-05K22KE2) / DFG project
                      G:(GEPRIS)328545488 - TRR 227: Ultraschnelle Spindynamik
                      (328545488)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G2 /
                      G:(DE-H253)F-20220710 / G:(DE-H253)F-20211728-EC /
                      G:(DE-Ds200)BMBF-05K22KE2 / G:(GEPRIS)328545488},
      experiment   = {EXP:(DE-H253)F-PL23-20230101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:40290413},
      UT           = {WOS:001478387200002},
      doi          = {10.1063/4.0000297},
      url          = {https://bib-pubdb1.desy.de/record/622851},
}