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Antiferromagnetically Spin Polarized Oxygen Observed in Magnetoelectric TbMn2O5

Beale, TAW; Wilkins, SB; Johnson, RD; Bland, SR; Joly, Y; Forrest, TR; McMorrow, DF; Yakhou, F; Prabhakaran, D; Boothroyd, AT; Hatton, PD

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TAW Beale

SB Wilkins

RD Johnson

SR Bland

Y Joly

TR Forrest

DF McMorrow

F Yakhou

D Prabhakaran

AT Boothroyd


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.


Beale, T., Wilkins, S., Johnson, R., Bland, S., Joly, Y., Forrest, T., …Hatton, P. (2010). Antiferromagnetically Spin Polarized Oxygen Observed in Magnetoelectric TbMn2O5. Physical Review Letters, 105(8), Article 087203.

Journal Article Type Article
Publication Date Aug 1, 2010
Deposit Date Sep 10, 2010
Publicly Available Date Nov 28, 2012
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 105
Issue 8
Article Number 087203
Keywords Neutron-diffraction, Scattering.


Published Journal Article (435 Kb)

Copyright Statement
© 2010 American Physical Society

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