Mass transport in La1−xSrxFeO3(x=0 and 0.1) measured by SIMS

Tracer diffusion coefficients in La1−xSrxFeO3, x=0 and 0.1 from 900 to 1100 °C for both A- and B-site diffusions were examined with secondary ion mass spectrometry (SIMS) 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 168±24 kJ/mol for the Y tracer and 150±30 kJ/mol for the Cr tracer. The 18O-tracer diffusion coefficients were found to be significantly higher in La0.9Sr0.1FeO3 compared with LaFeO3.