Antiferromagnetically spin polarized oxygen observed in magnetoelectric TbMn2O5

Autor: Beale, TA, Wilkins, SB, Johnson, RD, Bland, SR, Joly, Y, Forrest, TR, McMorrow, DF, Yakhou, F, Prabhakaran, D, Boothroyd, AT, Hatton, PD
Přispěvatelé: Department of Physics, Durham University, Brookhaven, Natl Lab., Brookhaven National Laboratory [Upton, NY] (BNL), U.S. Department of Energy [Washington] (DOE)-UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY)-U.S. Department of Energy [Washington] (DOE)-UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Surfaces, Interfaces et Nanostructures (SIN), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), London Centre for Nanotechnology, University College of London [London] (UCL), Science et Ingénierie des Matériaux et Procédés (SIMaP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Department of Physics, Clarendon Laboratory, University of Oxford [Oxford], Clarendon Laboratory [Oxford], Durham University-Okayama University
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Physical review letters, 2010, Vol.105(8), pp.087203 [Peer Reviewed Journal]
Physical Review Letters
Physical Review Letters, American Physical Society, 2010, 105, pp.087203. ⟨10.1103/PhysRevLett.105.087203⟩
ISSN: 0031-9007
1079-7114
Popis: 4 pages; International audience; We report the direct measurement of antiferromagnetic spin polarization at the oxygen sites in the multiferroic TbMn2O5, through resonant soft x-ray magnetic scattering. This supports recent theoretical models suggesting that the oxygen spin polarization is key to the magnetoelectric coupling mechanism. The spin polarization is observed through a resonantly enhanced diffraction signal at the oxygen K edge at the commensurate antiferromagnetic wave vector. Using the FDMNES code we have accurately reproduced the experimental data. We have established that the resonance arises through the spin polarization on the oxygen sites hybridized with the square based pyramid Mn3þ ions. Furthermore we have discovered that the position of the Mn3þ ion directly influences the oxygen spin polarization.
Databáze: OpenAIRE
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