Enhancement of Oxygen Surface Exchange at the Hetero-interface of (La,Sr)CoO[sub 3]/(La,Sr)[sub 2]CoO[sub 4] with PLD-Layered Films

Abstract

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.