Pressure-induced electronic spin transition of iron in magnesiowustite- (Mg,Fe)O

Jung Fu Lin*, Alexander G. Gavriliuk, Viktor V. Struzhkin, Steven D. Jacobsen, Wolfgang Sturhahn, Michael Y. Hu, Paul Chow, Choong Shik Yoo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

An electronic transition of iron in magnesiowustite has been studied with synchrotron Mössbauer and x-ray emission spectroscopies under high pressures. Synchrotron Mössbauer studies show that the quadrupole splitting disappears and the isomer shift drops significantly across the spin-paring transition of iron in (Mg0.75, Fe0.25) O between 52 and 70 GPa. Based upon current results and percolation theory, we reexamine the high-pressure phase diagram of (Mg,Fe)O and find that iron-iron exchange interaction plays an important role in stabilizing the high-spin state of iron in FeO -rich (Mg,Fe)O.

Original languageEnglish (US)
Article number113107
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number11
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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