TY - JOUR
T1 - Monoclinic distortion and magnetic transitions in FeO under pressure and temperature
AU - Li, Xiang
AU - Bykova, Elena
AU - Vasiukov, Denis
AU - Aprilis, Georgios
AU - Chariton, Stella
AU - Cerantola, Valerio
AU - Bykov, Maxim
AU - Müller, Susanne
AU - Pakhomova, Anna
AU - Akbar, Fariia I.
AU - Mukhina, Elena
AU - Kantor, Innokenty
AU - Glazyrin, Konstantin
AU - Comboni, Davide
AU - Chumakov, Aleksandr I.
AU - McCammon, Catherine
AU - Dubrovinsky, Leonid
AU - Sanchez-Valle, Carmen
AU - Kupenko, Ilya
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024
Y1 - 2024
N2 - Fe1-xO, although chemically simple, possesses a complex structural and magnetic phase diagram. The crystal structures of Fe1-xO and its magnetic properties at extreme conditions are still a matter of debate. Here, we performed a systematic investigation on Fe0.94O up to 94 GPa and 1700 K using synchrotron X-ray diffraction and synchrotron Mössbauer source spectroscopy. We observe a transition of Fe0.94O to the monoclinic phases above 40 GPa and at high temperatures and use the group theory analysis of the observed phases to discuss their properties and their relation to the ambient pressure phases. The Mössbauer spectra of the rhombohedral and the room temperature monoclinic phase contain a component attributed to Fe2.5+, caused by the electron exchange between the Fe3+ defect and neighboring Fe2+ atoms. Our results present a structural and magnetic transitional pressure-temperature diagram of Fe1-xO and show the complex physicochemical properties of simple Fe1-xO binary oxide under extreme conditions.
AB - Fe1-xO, although chemically simple, possesses a complex structural and magnetic phase diagram. The crystal structures of Fe1-xO and its magnetic properties at extreme conditions are still a matter of debate. Here, we performed a systematic investigation on Fe0.94O up to 94 GPa and 1700 K using synchrotron X-ray diffraction and synchrotron Mössbauer source spectroscopy. We observe a transition of Fe0.94O to the monoclinic phases above 40 GPa and at high temperatures and use the group theory analysis of the observed phases to discuss their properties and their relation to the ambient pressure phases. The Mössbauer spectra of the rhombohedral and the room temperature monoclinic phase contain a component attributed to Fe2.5+, caused by the electron exchange between the Fe3+ defect and neighboring Fe2+ atoms. Our results present a structural and magnetic transitional pressure-temperature diagram of Fe1-xO and show the complex physicochemical properties of simple Fe1-xO binary oxide under extreme conditions.
U2 - 10.1038/s42005-024-01797-1
DO - 10.1038/s42005-024-01797-1
M3 - Journal article
AN - SCOPUS:85204283382
SN - 2399-3650
VL - 7
JO - Communications Physics
JF - Communications Physics
IS - 1
M1 - 305
ER -