Journal Article

PreJuSER-58294

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Strong coupling between the spin polarization of Mn and Tb in multiferroic TbMnO3 determined by x-ray resonance exchange scattering

Voigt, J.FZJ* ; Persson, J.FZJ* ; Kim, J. W. ; Bihlmayer, G.FZJ* ; Brückel, T.FZJ*

2007
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/3035  doi:10.1103/PhysRevB.76.104431

Abstract: We report on an x-ray resonance exchange scattering (XRES) study of multiferroic TbMnO3. Magnetic scattering is observed close to the Mn K edge and the Tb L-III and L-II edges. Surprisingly, Tb shows XRES also in the paraelectric phase, where neutron diffraction results suggested the 4f moments to be disordered. The temperature dependence of the XRES intensities shows a distinct kink close to the ferroelectric transition temperature T-C for all absorption edges. We were able to model the temperature dependence for all edges, assuming a strong coupling of Mn and Tb magnetism via the spin polarized 5d conduction band. We argue that the hybridization between Mn and Tb states is a prerequisite for the multiferroic effect in this material.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)
2. Streumethoden (IFF-4)
3. Neutronenstreuung (IFF-5)
4. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)
5. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Kondensierte Materie (P54)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Appears in the scientific report 2007
Notes: Copyright APS. This version is available at http://link.aps.org/abstract/PRB/v76/e104431

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