Tracer diffusion coefficients in La1−xSrxFeO3, x = 0 and 0.1 from 900 to 1100C for both A- and B-site diffusions were examined with secondary ion mass spectrometry applying Y3+ and Cr3+ as tracers. In both compositions, the B-site diffusion, represented by Cr, was found to be faster than the A-site diffusion, represented by Y. The obtained activation energies for bulk diffusion in La0.9Sr0.1FeO3 were 168kJ/mol for the Y tracer and 150kJ/mol for the Cr tracer. The 18O-tracer diffusion coefficients were found to be significantly higher in La0.9Sr0.1FeO3 compared with LaFeO3.

Mass Transport in La1−xSrxFeO3 (x = 0 and 0.1) Measured by SIMS. I.Wærnhus, N.Sakai, H.Yokokawa, T.Grande, M.A.Einarsrud, K.Wiik: Solid State Ionics, 2004, 175[1-4], 69-71