Publication details for Prof Peter HattonBeale, TAW, Wilkins, SB, Johnson, RD, Bland, SR, Joly, Y, Forrest, TR, McMorrow, DF, Yakhou, F, Prabhakaran, D, Boothroyd, AT & Hatton, PD (2010). Antiferromagnetically Spin Polarized Oxygen Observed in Magnetoelectric TbMn2O5. Physical Review Letters 105(8): 087203.
- Publication type: Journal Article
- ISSN/ISBN: 0031-9007, 1079-7114
- DOI: 10.1103/PhysRevLett.105.087203
- Keywords: Neutron-diffraction, Scattering
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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.