Title of article :
SIMS artifacts in the near surface depth profiling of oxygen conducting ceramics
Author/Authors :
Fearn، نويسنده , , Sarah and Rossiny، نويسنده , , Jeremy and Kilner، نويسنده , , John، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2008
Pages :
5
From page :
811
To page :
815
Abstract :
Using ultra low energy SIMS ion beams of oxygen and nitrogen, the very near surface region of an 16O annealed La0.8Sr0.2MnO3 pellet has been depth profiled in order to investigate the surface layer composition and to determine any perturbing ion beam–target interactions. By ratioing the measured cation species, the results indicate that only Sr segregation at the near surface can be clearly identified, and no separate oxide layer was present on the top surface. By monitoring the build up of the altered layer associated with SIMS depth profiling, it was observed that the depth at which the altered layer was fully formed was deeper than the expected projected range, Rp, of the ion beam. These results confirm Sr excess in the near surface, which will have an effect on the vacancy concentration and therefore the surface exchange coefficient, k.
Keywords :
Surface exchange coefficient , oxygen diffusion , Low energy SIMS , LSM
Journal title :
Solid State Ionics
Serial Year :
2008
Journal title :
Solid State Ionics
Record number :
1720578
Link To Document :
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