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@ARTICLE{Trautner:587905,
      author       = {Trautner, Viktoria and Stackhouse, Stephen and Turner,
                      Alice R. and Koelemeijer, Paula and Davies, D. Rhodri and
                      Méndez, Alba San José and Satta, Niccolo and Kurnosov,
                      Alexander and Liermann, Hanns-Peter and Marquardt, Hauke},
      title        = {{C}ompressibility of ferropericlase at high-temperature:
                      {E}vidence for the iron spin crossover in seismic
                      tomography},
      journal      = {Earth and planetary science letters},
      volume       = {618},
      issn         = {0012-821X},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2023-04601},
      pages        = {118296 -},
      year         = {2023},
      note         = {Creative Commons licence Attribution 4.0 International (CC
                      BY 4.0)},
      abstract     = {The iron spin crossover in ferropericlase, the second most
                      abundant mineral in Earth's lower mantle, causes changes in
                      a range of physical properties, including seismic wave
                      velocities. Understanding the effect of temperature on the
                      spin crossover is essential to detect its signature in
                      seismic observations and constrain its occurrence in the
                      mantle. Here, we report the first experimental results on
                      the spin crossover-induced bulk modulus softening at high
                      temperatures, derived directly from time-resolved x-ray
                      diffraction measurements during continuous compression of
                      (Mg$_{0.8}$Fe$_{0.2}$)O in a resistive-heated dynamic
                      diamond-anvil cell. We present new theoretical calculations
                      of the spin crossover at mantle temperatures benchmarked by
                      the experiments. Based on our results, we create synthetic
                      seismic tomography models to investigate the signature of
                      the spin crossover in global seismic tomography. A
                      tomographic filter is applied to allow for meaningful
                      comparisons between the synthetic models and data-based
                      seismic tomography models, like SP12RTS. A negative anomaly
                      in the correlation between Vs variations and Vc variations
                      (S-C correlation) is found to be the most suitable measure
                      to detect the presence of the spin crossover in tomographic
                      models. When including the effects of the spin crossover,
                      the misfit between the synthetic model and SP12RTS is
                      reduced by 63\%, providing strong evidence for the presence
                      of the spin crossover, and hence ferropericlase, in the
                      lower mantle. Future improvement of seismic resolution may
                      facilitate a detailed mapping of spin state using the S-C
                      correlation, providing constraints on mantle temperatures by
                      taking advantage of the temperature sensitivity of the spin
                      crossover.},
      cin          = {DOOR ; HAS-User / FS-PET-D},
      ddc          = {550},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PET-D-20190712},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) / DEEP-MAPS -
                      Deep Earth Mantle Phase Transition Maps: Studied by
                      Time-Resolved Experiments (864877)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
                      G:(EU-Grant)864877},
      experiment   = {EXP:(DE-H253)P-P02.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001046198100001},
      doi          = {10.1016/j.epsl.2023.118296},
      url          = {https://bib-pubdb1.desy.de/record/587905},
}