Spin crossover in FeO under shock compression
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866917351139573760 |
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| author | Libon, Lélia Ravasio, Alessandra Pandolfi, Silvia Zhang, Yanyao Wei, Xuehui Hernandez, Jean-Alexis Yang, Hong Chen, Amanda J. Vinci, Tommaso Benuzzi-Mounaix, Alessandra Prescher, Clemens Soubiran, François Lee, Hae Ja Galtier, Eric Czapla, Nick Mao, Wendy L. Gleason, Arianna E. Shim, Sang Heon Alonso-Mori, Roberto Morard, Guillaume |
| author_facet | Libon, Lélia Ravasio, Alessandra Pandolfi, Silvia Zhang, Yanyao Wei, Xuehui Hernandez, Jean-Alexis Yang, Hong Chen, Amanda J. Vinci, Tommaso Benuzzi-Mounaix, Alessandra Prescher, Clemens Soubiran, François Lee, Hae Ja Galtier, Eric Czapla, Nick Mao, Wendy L. Gleason, Arianna E. Shim, Sang Heon Alonso-Mori, Roberto Morard, Guillaume |
| contents | FeO (wüstite), which exhibits complex electronic and structural properties with increasing pressure and temperature, is a key mineralogical phase for understanding deep planetary interiors. However, direct measurements of its spin state at high-pressure and temperature remain challenging in static compression experiments. Here, we employ laser-driven shock compression to extend the FeO principal Hugoniot up to $\sim$900 GPa and perform in situ X-ray diffraction and X-ray emission spectroscopy up to 250 GPa, probing FeO's crystal structure and spin state. We demonstrate a continuous spin crossover of iron in FeO over a broad pressure range, with the high-spin state persisting beyond Earth's core-mantle boundary (CMB) conditions. These observations provide new experimental constraints on iron spin state at extreme conditions essential for geophysical models of (exo)planetary interiors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_17136 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spin crossover in FeO under shock compression Libon, Lélia Ravasio, Alessandra Pandolfi, Silvia Zhang, Yanyao Wei, Xuehui Hernandez, Jean-Alexis Yang, Hong Chen, Amanda J. Vinci, Tommaso Benuzzi-Mounaix, Alessandra Prescher, Clemens Soubiran, François Lee, Hae Ja Galtier, Eric Czapla, Nick Mao, Wendy L. Gleason, Arianna E. Shim, Sang Heon Alonso-Mori, Roberto Morard, Guillaume Materials Science Earth and Planetary Astrophysics FeO (wüstite), which exhibits complex electronic and structural properties with increasing pressure and temperature, is a key mineralogical phase for understanding deep planetary interiors. However, direct measurements of its spin state at high-pressure and temperature remain challenging in static compression experiments. Here, we employ laser-driven shock compression to extend the FeO principal Hugoniot up to $\sim$900 GPa and perform in situ X-ray diffraction and X-ray emission spectroscopy up to 250 GPa, probing FeO's crystal structure and spin state. We demonstrate a continuous spin crossover of iron in FeO over a broad pressure range, with the high-spin state persisting beyond Earth's core-mantle boundary (CMB) conditions. These observations provide new experimental constraints on iron spin state at extreme conditions essential for geophysical models of (exo)planetary interiors. |
| title | Spin crossover in FeO under shock compression |
| topic | Materials Science Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2603.17136 |