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Publication Detail
Antiferromagnetically Spin Polarized Oxygen Observed in Magnetoelectric TbMn2O5
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Beale TAW, Wilkins SB, Johnson RD, Bland SR, Joly Y, Forrest TR, McMorrow DF, Yakhou F, Prabhakaran D, Boothroyd AT, Hatton PD
  • Publisher:
    AMER PHYSICAL SOC
  • Publication date:
    18/08/2010
  • Journal:
    PHYS REV LETT
  • Volume:
    105
  • Issue:
    8
  • Article number:
    087203
  • Print ISSN:
    0031-9007
  • Language:
    EN
  • Keywords:
    NEUTRON-DIFFRACTION, SCATTERING
  • Addresses:
    Beale, TAW
    Univ Durham
    Dept Phys
    Durham
    DH1 3LE
    England

    Univ Grenoble 1
    F-38042
    Grenoble
    9
    France
Abstract
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 Mn3+ ions. Furthermore we have discovered that the position of the Mn3+ ion directly influences the oxygen spin polarization.
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