Anomalous low-energy phonons in nearly tetragonal BiFeO3 thin films

K. -Y. Choi, S. H. Do, P. Lemmens +5

We present evidence for a concomitant structural and ferroelectric transformation around $T_S\sim 360$ K in multiferroic BiFeO${}_3$/LaAlO${}_3$ thin films close to the tetragonal phas…