Abstract
The high‐temperature tetragonal structure of Ta2O5 was observed in a Ta2O5 ceramic sample doped with 8 at.% TiO2. Direct evidences for the modulation along [] direction caused by Ti replacing Ta are obtained based on atomic‐resolution high‐angle annular dark‐field lattice imaging and electron energy loss spectroscopy analysis. The atomic mechanism of Ti substitution of Ta is explicitly described based on the structure model along [110] direction projection.
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