TY  - JOUR
AU  - Voigt, J.
AU  - Persson, J.
AU  - Kim, J. W.
AU  - Bihlmayer, G.
AU  - Brückel, T.
TI  - Strong coupling between the spin polarization of Mn and Tb in multiferroic TbMnO3 determined by x-ray resonance exchange scattering
JO  - Physical review / B
VL  - 76
IS  - 10
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-58294
SP  - 104431
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000249786300076
DO  - DOI:10.1103/PhysRevB.76.104431
UR  - https://juser.fz-juelich.de/record/58294
ER  -