title: Magnetic instabilities in Fe3C cementite particles observed with Fe K-edge x-ray circular dichroism under pressure.
abstract: The ferromagnetic interstitial iron compound Fe(3)C (cementite) is expected to have Invar properties, whereby a high-moment to low-moment transition should occur when the atomic volume is reduced below a critical value. We, therefore, examine the pressure dependence of the Fe K-edge x-ray magnetic circular dichroism in Fe(3)C at ambient temperature and pressures up to 20 GPa. We find clear evidence for a high-moment to low-moment transition around 10 GPa.
authors.affiliation: Experimentalphysik, Universität Duisburg-Essen, D-47048 Duisburg, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Duman
authors.forename: M
authors.initials: M
authors.lastname: Acet
authors.forename: E F
authors.initials: EF
authors.lastname: Wassermann
authors.forename: J P
authors.initials: JP
authors.lastname: Itié
authors.forename: F
authors.initials: F
authors.lastname: Baudelet
authors.forename: O
authors.initials: O
authors.lastname: Mathon
authors.forename: S
authors.initials: S
authors.lastname: Pascarelli