Parity- and time-odd atomic multipoles in magnetoelectric GaFeO3 as seen via soft x-ray Bragg diffraction

U Staub, Y Bodenthin, C Piamonteze, M Garcia-Fernandez, V Scagnoli, M Garganourakis, Seyed Koohpayeh, David Fort, SW Lovesey

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22 Citations (Scopus)

Abstract

We present resonant soft x-ray Bragg diffraction data on the space-group forbidden (010) reflection at the Fe L-2,L-3 edges of magnetoelectric GaFeO3. Observed intensities give direct evidence for strange atomic multi-poles that violate both time and space inversion, in particular a magnetoelectric quadrupole. The discovery of magnetoelectric multipoles in the open 3d shell is a direct measure of coupling between magnetic and electric properties and a basis to a microscopic understanding of magnetically induced multiferroics.
Original languageEnglish
Pages (from-to)140410
Number of pages1
JournalPhysical Review B
Volume80
Issue number14
DOIs
Publication statusPublished - 1 Oct 2009

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