%0 Journal Article
%A Li, H.-F.
%A Su, Y.
%A Chatterji, T.
%A Nefedov, A.
%A Persson, J.
%A Meuffels, P.
%A Xiao, Y.
%A Vaknin, D.
%A Brückel, T.
%T Soft x-ray resonant scattering study of single-crystal LaSr2Mn2O7
%J The European physical journal / B
%V 74
%@ 1434-6028
%C Berlin
%I Springer
%M PreJuSER-9413
%P 457 - 461
%D 2010
%Z We are grateful for the excellent technical support from BESSY-II, Germany. This work was partially supported by the BMBF under contract No. O3ZA6BC2.
%X Soft X-ray resonant scattering studies at the Mn L-II,L- III- and the La M-IV,M- V- edges of single-crystal LaSr2Mn2O7 are reported. At low temperatures, below T-N a parts per thousand 160 K, energy scans with a fixed momentum transfer at the A-type antiferromagnetic (0 0 1) reflection around the Mn L-II,L- III-edges with incident linear sigma and pi polarizations show strong resonant enhancements. The splitting of the energy spectra around the Mn L-II,L- III-edges may indicate the presence of a mixed valence state, e.g., Mn3+/Mn4+. The relative intensities of the resonance and the clear shoulder-feature as well as the strong incident sigma and pi polarization dependences strongly indicate its complex electronic origin. Unexpected enhancement of the charge Bragg (0 0 2) reflection at the La M-IV,M- V-edges with sigma polarization has been observed up to 300 K, with an anomaly appearing around the orbital-ordering transition temperature, T-OO a parts per thousand 220 K, suggesting a strong coupling (competition) between them.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000276900000005
%R 10.1140/epjb/e2010-00117-3
%U https://juser.fz-juelich.de/record/9413