%0 Journal Article
%A Nandi, S.
%A Su, Y.
%A Xiao, Y.
%A Price, S.
%A Wang, X. F.
%A Chen, X. H.
%A Herrero-Martín, J.
%A Mazzoli, C.
%A Walker, H. C.
%A Paolasini, L.
%A Francoual, S.
%A Shukla, D. K.
%A Strempfer, J.
%A Chatterji, T.
%A Kumer, C. M. N.
%A Mittal, R.
%A Ronnow, H. M.
%A Rüegg, Ch.
%A McMorrow, D. F.
%A Brückel, T.
%T Strong coupling of Sm and Fe magnetism in SmFeAsO as revealed by magnetic x-ray scattering
%J Physical review / B
%V 84
%N 5
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-16086
%P 054419
%D 2011
%Z Record converted from VDB: 12.11.2012
%X The magnetic structures adopted by the Fe and Sm sublattices in SmFeAsO have been investigated using element-specific x-ray resonant and nonresonant magnetic scattering techniques. Between 110 and 5 K, the Sm and Fe moments are aligned along the c and a directions, respectively, according to the same magnetic representation Gamma(5) and the same propagation vector (1 0 1/2). Below 5 K, the magnetic order of both sublattices changes to a different magnetic structure, and the Sm moments reorder in a magnetic unit cell equal to the chemical unit cell. Modeling of the temperature dependence for the Sm sublattice, as well as a change in the magnetic structure below 5 K, provides clear evidence of a surprisingly strong coupling between the two sublattices, and indicates the need to include anisotropic exchange interactions in models of SmFeAsO and related compounds.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000293553100011
%R 10.1103/PhysRevB.84.054419
%U https://juser.fz-juelich.de/record/16086