Metal-ligand interplay in strongly correlated oxides: a parametrized phase diagram for pressure-induced spin transitions.

Abstract

We investigate the magnetic properties of archetypal transition-metal oxides MnO, FeO, CoO, and NiO under very high pressure by x-ray emission spectroscopy at the Kbeta line. We observe a strong modification of the magnetism in the megabar range in all the samples except NiO. The results are analyzed within a multiplet approach including charge-transfer effects. The spectral changes are well accounted for by changes of the ligand field acting on the d electrons and allows us to extract the d-hybridization strength, O-2p bandwidth and ionic crystal field across the magnetic transition. This approach allows first-hand insight into the mechanism of the pressure-induced spin transition.

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Cite this paper

@article{Mattila2007MetalligandII, title={Metal-ligand interplay in strongly correlated oxides: a parametrized phase diagram for pressure-induced spin transitions.}, author={Aleksi Mattila and Jean-Pascal Rueff and James Badro and Gy{\"{o}rgy Vank{\'o} and Abhay Shukla}, journal={Physical review letters}, year={2007}, volume={98 19}, pages={196404} }