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@INPROCEEDINGS{Guasco:1031857,
      author       = {Guasco, Laura and Khaydukov, Yury N. and Keller, Thomas and
                      Saerbeck, Thomas and Pütter, Sabine},
      title        = {{H}ydrogen absorption and spin reorientation in
                      {P}t/{C}o/{P}t and {P}d/{C}o/{P}d},
      reportid     = {FZJ-2024-05868},
      year         = {2024},
      abstract     = {Pt/Co/Pt and Pd/Co/Pd heterostructures with perpendicular
                      magnetic anisotropy (PMA) are traditionally used for
                      magnetic recording to achieve high magnetic data storage
                      density. PMA can be tuned by e.g. thin film thickness,
                      strain, ion bombardment or temperature. Recently, it has
                      been shown that the absorption of hydrogen in the heavy
                      metal modifies the interfacial spin-orbit coupling and hence
                      reduces the PMA.[1-3] As a result, reversible and
                      non-destructive toggling of the easy axis of magnetization
                      between in-plane and out-of-plane orientation at room
                      temperature was demonstrated in a Co/GdOx all-solid-state
                      device for magnetic hydrogen sensing.[4]Polarized neutron
                      reflectivity is an effective tool for studying the hydrogen
                      uptake and its impact on the magnetic properties in PMA
                      systems.[2, 5] Recently, resonance enhanced polarized
                      neutron reflectometry (RNR) has proven to be a quantitative
                      method for the determination of the hydrogen concentration
                      with with a possible time resolution in the sub second (or
                      few 10 millisecond) to few seconds regime. [6]In this
                      contribution we report the results of RNR experiments on
                      hydrogen uptake in a Pt/Co/Pt trilayer sandwiched by 25 nm
                      Nb layers on MgO(001) substrates fabricated by molecular
                      beam epitaxy. Furthermore we discuss the differences in
                      Pt/Co/Pt and Pd/Co/Pd trilayers with respect to their
                      magnetic properties and hydrogen uptake.[1] S. M.
                      Valvidares, et al., Phys. Rev. B 81, 024415 (2010)[2] K.
                      Munbodh, et al., Phys. Rev. B 83 094432 (2011)[3] C. S.
                      Chang, M. Kostylev and E. Ivanov, Appl. Phys. Lett. 102
                      142405 (2013) [4] J. Tan et al. Nature Materials 18 35
                      (2019)[5] G. Causer et al., ACS Appl. Mater. Interfaces 38
                      35420 (2019)[6] L. Guasco et al., Nature Comm. 13 1486
                      (2022)},
      month         = {Oct},
      date          = {2024-10-08},
      organization  = {JCNS Workshop Trends and Perspectives
                       in Neutron Scattering: Functional
                       interfaces, Tutzing (Germany), 8 Oct
                       2024 - 11 Oct 2024},
      subtyp        = {After Call},
      cin          = {JCNS-4 / JCNS-FRM-II / MLZ},
      cid          = {I:(DE-Juel1)JCNS-4-20201012 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)MBE-MLZ-20151210},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1031857},
}