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Electromagnetic properties of doped perovskites depend sensitively on thedoping level. Both the superconducting transition temperature ofBi2Sr2Ca(Pr)Cu2O8+d compounds and the magnetic and electronic transportproperties of La(Sr)Co(Fe)O3 perovskites change dramatically with the dopinglevel. Apart from doping, oxygen deficiency is influenced by the details ofpreparation processes such as calcination and sintering. Simultaneousdetermination of constituents is of crucial importance from samplecharacterization point of view. Quantitative analysis of perovskite oxides canbe performed by Secondary Neutral Mass Spectrometry (SNMS) which is a suitabletechnique to measure the chemical composition of almost any sample because theflux of atoms sputtered from the sample is representative of the stoichiometryof the top-most layers. The composition and oxygen content ofBi2Sr2Ca0.86Pr0.14Cu2O8.4 and La1-xSrxCo0.975Fe0.025O3-d, where 0<x<0.5, weredetermined by SNMS. The results show that the method is equally applicable forinsulating and conducting compounds. The observed electromagnetic propertiesreflect well the compositions obtained experimentally.

Application of Secondary Neutral Mass Spectrometry in the investigation of doped perovskites