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Determination of manganese valency in La1−xSrxMnO3 using ELNES in the (S)TEM

✍ Scribed by T. Riedl; T. Gemming; W. Gruner; J. Acker; K. Wetzig

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
497 KB
Volume
38
Category
Article
ISSN
0968-4328

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✦ Synopsis

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.

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