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Circularly Polarized X Rays as a Probe of Noncollinear Magnetic Order in Multiferroic TbMnO3

Fabrizi, F; Walker, HC; Paolasini, L; de Bergevin, F; Boothroyd, AT; Prabhakaran, D; McMorrow, DF; (2009) Circularly Polarized X Rays as a Probe of Noncollinear Magnetic Order in Multiferroic TbMnO3. PHYS REV LETT , 102 (23) , Article 237205. 10.1103/PhysRevLett.102.237205. Green open access

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Abstract

Nonresonant x-ray magnetic scattering has been used to study the magnetic structure of multiferroic TbMnO3 in its ferroelectric phase. Circularly polarized x rays were combined with full polarization analysis of the scattered beam to reveal important new information on the magnetic structure of this canonical multiferroic. An applied electric field is shown to create essentially a single magnetic domain state in which the cycloidal order on the Mn sublattice rotates either clockwise or anticlockwise depending on the sign of the field. It is demonstrated how this technique provides sensitivity to the absolute sense of rotation of the Mn moments and to components of the ordering on the Tb sublattice and phase shifts that earlier neutron diffraction experiments could not resolve.

Type: Article
Title: Circularly Polarized X Rays as a Probe of Noncollinear Magnetic Order in Multiferroic TbMnO3
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.102.237205
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.102.237205
Language: English
Additional information: © 2009 The American Physical Society
Keywords: SCATTERING INVESTIGATIONS, BIFEO3, ABSORPTION, DOMAINS, FILMS
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/114375
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