title: X-ray magnetochiral dichroism: a new spectroscopic probe of parity nonconserving magnetic solids.
abstract: We report the first experimental detection of x-ray magnetochiral dichroism in magnetoelectric Cr2O3. This dichroism, which does not require any polarized x-ray beam, is related to the time-reversal odd part of the optical activity tensor dominated by electric dipole-electric quadrupole E1E2 interference terms. The experiments were carried out using either a single crystal or a powdered pellet required to grow a single antiferromagnetic domain by magnetoelectric annealing. This new element (edge) specific spectroscopy offers unique access to the atomic orbital anapole moment Omega-z.
authors.affiliation: European Synchrotron Radiation Facility (E.S.R.F.), Boîte Postale 220, 38043 Grenoble Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Goulon
authors.forename: A
authors.initials: A
authors.lastname: Rogalev
authors.forename: F
authors.initials: F
authors.lastname: Wilhelm
authors.forename: C
authors.initials: C
authors.lastname: Goulon-Ginet
authors.forename: P
authors.initials: P
authors.lastname: Carra
authors.forename: D
authors.initials: D
authors.lastname: Cabaret
authors.forename: C
authors.initials: C
authors.lastname: Brouder