Spin crossover in FeO under shock compression
Abstrak
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.
Topik & Kata Kunci
Penulis (20)
Lélia Libon
Alessandra Ravasio
Silvia Pandolfi
Yanyao Zhang
Xuehui Wei
Jean-Alexis Hernandez
Hong Yang
Amanda J. Chen
Tommaso Vinci
Alessandra Benuzzi-Mounaix
Clemens Prescher
François Soubiran
Hae Ja Lee
Eric Galtier
Nick Czapla
Wendy L. Mao
Arianna E. Gleason
Sang Heon Shim
Roberto Alonso-Mori
Guillaume Morard
Akses Cepat
- Tahun Terbit
- 2026
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓