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

Aleksi Mattila, Jean Pascal Rueff, James Badro, György Vankó, Abhay Shukla

Research output: Contribution to journalArticle

33 Citations (Scopus)

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 Kβ 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.

Original languageEnglish
Article number196404
JournalPhysical review letters
Volume98
Issue number19
DOIs
Publication statusPublished - May 9 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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