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Determination of magnetic order of the rare-earth ions in multiferroic TbMn2O5.

Johnson, R.D. and Bland, S.R. and Mazzoli, C. and Beale, T.A.W. and Du, C.H. and Detlefs, C. and Wilkins, S.B. and Hatton, P.D. (2008) 'Determination of magnetic order of the rare-earth ions in multiferroic TbMn2O5.', Physical review B., 78 (10).

Abstract

We have employed resonant x-ray magnetic scattering to specifically probe the magnetic order of the rare-earth ions in multiferroic TbMn2O5. Two energy resonances were observed, one originated from the E1-E1 dipolar transition and the other from the E2-E2 quadrupolar transition. These resonances directly probe the valence 5d band and the partially occupied 4f band, respectively. First, full polarization analysis, which is a measurement of the scattered polarization as a function of incident polarization, confirmed a spin polarization of the terbium valence states (probed by the E1-E1 transition) by the Mn4+ spin density in the commensurate phase. Second, full polarization analysis data were collected in the low-temperature incommensurate and commensurate phases when tuned to the E2-E2 resonance. By employing a least-squares fitting procedure, the spin orientations of the terbium ion sublattice were refined.

Item Type:Article
Keywords:X-ray-scattering, Resonant exchange scattering, Polarization dependence, Neutron-diffraction, Phase-transitions, Quadrupolar, Plates, Edge.
Full text:PDF - Published Version (995Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1103/PhysRevB.78.104407
Publisher statement:© 2008 The American Physical Society
Record Created:27 Nov 2012 11:35
Last Modified:27 Nov 2012 11:59

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