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@ARTICLE{Li:9413,
author = {Li, H.-F. and Su, Y. and Chatterji, T. and Nefedov, A. and
Persson, J. and Meuffels, P. and Xiao, Y. and Vaknin, D. and
Brückel, T.},
title = {{S}oft x-ray resonant scattering study of single-crystal
{L}a{S}r2{M}n2{O}7},
journal = {The European physical journal / B},
volume = {74},
issn = {1434-6028},
address = {Berlin},
publisher = {Springer},
reportid = {PreJuSER-9413},
pages = {457 - 461},
year = {2010},
note = {We are grateful for the excellent technical support from
BESSY-II, Germany. This work was partially supported by the
BMBF under contract No. O3ZA6BC2.},
abstract = {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.},
keywords = {J (WoSType)},
cin = {IFF-4 / IFF-5 / JARA-FIT / Jülich Centre for Neutron
Science JCNS (JCNS) ; JCNS / IFF-6},
ddc = {530},
cid = {I:(DE-Juel1)VDB784 / I:(DE-Juel1)VDB785 /
$I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-20121112 /
I:(DE-Juel1)VDB786},
pnm = {BioSoft: Makromolekulare Systeme und biologische
Informationsverarbeitung / Großgeräte für die Forschung
mit Photonen, Neutronen und Ionen (PNI)},
pid = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
shelfmark = {Physics, Condensed Matter},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000276900000005},
doi = {10.1140/epjb/e2010-00117-3},
url = {https://juser.fz-juelich.de/record/9413},
}