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

DOI: 10.1103/PhysRevB.80.140410 DOI Help

Authors: U. Staub (Paul Scherrer Inst) , Y. Bodenthin (Swiss Light Source) , C. Piamonteze (Paul Scherrer Institut) , M. Garcia-fernandez (Swiss Light Source) , V. Scagnoli (Paul Scherrer Institut) , M. Garganourakis (Paul Scherrer Institute) , S. Koohpayeh (University of Birmingham) , D. Fort (University of Birmingham) , S. Lovesey (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 80 (14) , PAGES 140410

State: Published (Approved)
Published: October 2009

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.

Subject Areas: Physics

Technical Areas: Theoretical Physics

Added On: 26/04/2010 09:45

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