The preferential site for oxygen isotope exchange was investigated on layered films of prepared by pulsed laser deposition (PLD) on a polycrystalline . An isotope exchange experiment was performed at 773 K in -enriched oxygen of . Three-dimensional imaging of secondary ion mass spectrometry (SIMS) was carried out to visualize the isotope distribution. The SIMS images suggested that there are fast oxygen-incorporation paths along the hetero-phase interface of . The results have reproduced our former findings on the fast oxygen surface exchange with composite polycrystals.
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Sase et al. (2008) studied this question.
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