Coherent magnon and acoustic phonon dynamics in tetragonal and rare-earth-doped BiFeO3 multiferroic thin films - Doig, KI; Aguesse, F; Axelsson, AK; Alford, NM; Nawaz, S; Palkar, VR; Jones, SPP; Johnson, RD; Synowicki, RA; Lloyd-Hughes, J (PHYSICAL REVIEW B, 2013)