%0 Journal Article
%A Voigt, J.
%A Persson, J.
%A Kim, J. W.
%A Bihlmayer, G.
%A Brückel, T.
%T Strong coupling between the spin polarization of Mn and Tb in multiferroic TbMnO3 determined by x-ray resonance exchange scattering
%J Physical review / B
%V 76
%N 10
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-58294
%P 104431
%D 2007
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000249786300076
%R 10.1103/PhysRevB.76.104431
%U https://juser.fz-juelich.de/record/58294