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Cu_{3}Nb_{2}O_{8}: A Multiferroic with Chiral Coupling to the Crystal Structure

DOI: 10.1103/PhysRevLett.107.137205 DOI Help
PMID: 22026901 PMID Help

Authors: Roger Johnson (University of Oxford) , Sunil Nair (University of Oxford) , Laurent Chapon (ISIS) , Alessandro Bombardi (Diamond Light Source) , Carlo Vecchini (Diamond Light Source) , D. Prabhakaran (University of Oxford) , Andrew Boothroyd (University of Oxford) , Paolo Radaelli (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 107 (13)

State: Published (Approved)
Published: September 2011
Diamond Proposal Number(s): 6829

Abstract: By combining bulk properties, neutron diffraction, and nonresonant x-ray diffraction measurements, we demonstrate that the new multiferroic Cu3Nb2O8 becomes polar simultaneously with the appearance of generalized helicoidal magnetic ordering. The electrical polarization is oriented perpendicularly to the common plane of rotation of the spins—an observation that cannot be reconciled with the conventional theory developed for cycloidal multiferroics. Our results are consistent with coupling between a macroscopic structural rotation, which is allowed in the paramagnetic group, and magnetically induced structural chirality.

Journal Keywords: Multiferroics

Subject Areas: Physics

Instruments: I16-Materials and Magnetism

Added On: 30/09/2011 16:50

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