Determination of manganese valency in La1-xSrxMnO3 using ELNES in the (S)TEM.
In this article several experimentally identified Mn valence-sensitive ELNES quantities for the La1-xSrxMnO3 compound class are presented, namely the energy separations between Mn-L3 and O-Ka, between O-Kb and O-Ka edges, the Mn-L2,3 white line intensity ratio, and the Mn-L3 line width. Valence sensitivities of these quantities are evaluated, and possible additional influences on them are considered. At high signal-to-noise ratio the two energy separations display most sensitively changes of the Mn valency. An experiment-based estimation of the total uncertainties of the quantities indicates that at low signal-to-noise ratio, which is the case when studying interface effects at high spatial resolution, again both energy separations allow to resolve the smallest valency changes.
Riedl
T
T
IFW Dresden, PF 270116, D-01171 Dresden, Germany. T.Riedl@ifw-dresden.de
Gemming
T
T
Gruner
W
W
Acker
J
J
Wetzig
K
K