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Creators/Authors contains: "Alonso-Mori, Roberto"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Nature Communications)
    Free, publicly-accessible full text available December 1, 2025
  2. ; ; ; ; ; ; ; ; ; ; et al (, The Journal of Physical Chemistry B)
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  3. ; ; ; ; ; ; ; ; ; ; et al (, The Journal of Physical Chemistry B)
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  4. ; ; ; ; ; ; ; ; ; ; et al (, Science Advances)
    The spin state of Fe can alter the key physical properties of silicate melts, affecting the early differentiation and the dynamic stability of the melts in the deep rocky planets. The low-spin state of Fe can increase the affinity of Fe for the melt over the solid phases and the electrical conductivity of melt at high pressures. However, the spin state of Fe has never been measured in dense silicate melts due to experimental challenges. We report detection of dominantly low-spin Fe in dynamically compressed olivine melt at 150 to 256 gigapascals and 3000 to 6000 kelvin using laser-driven shock wave compression combined with femtosecond x-ray diffraction and x-ray emission spectroscopy using an x-ray free electron laser. The observation of dominantly low-spin Fe supports gravitationally stable melt in the deep mantle and generation of a dynamo from the silicate melt portion of rocky planets. 
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  5. ; ; ; ; ; ; ; ; ; ; et al (, Journal of the American Chemical Society)
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  6. ; ; ; ; ; ; ; ; ; ; et al (, Meteoritics & Planetary Science)
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  7. ; ; ; ; ; ; ; ; ; ; et al (, The Journal of Physical Chemistry B)
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  8. ; ; ; ; ; ; ; ; ; ; et al (, The Journal of Physical Chemistry B)
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  9. ; ; ; ; ; ; ; ; ; ; et al (, The Journal of Physical Chemistry Letters)
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  10. ; ; ; ; ; ; ; ; ; ; et al (, Proceedings of the National Academy of Sciences)
    Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultrafast resonant inelastic X-ray scattering we demonstrate that femtosecond laser pulses can excite transient magnons at large wavevectors in gapped antiferromagnets and that they persist for several picoseconds, which is opposite to what is observed in nearly gapless magnets. Our work suggests that materials with isotropic magnetic interactions are preferred to achieve rapid manipulation of magnetism. 
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