Spin and lattice excitations of a BiFeO3 thin film and ceramics

S. Skiadopoulou,1,* V. Goian,1 C. Kadlec,1 F. Kadlec,1 X. F. Bai,2 I. C. Infante,2 B. Dkhil,2 C. Adamo,3,4 D. G. Schlom,3,5 and S. Kamba1,† 1Institute of Physics, The Czech Academy of Sciences, Na Slovance 2, 182 21 Prague 8, Czech Republic 2Laboratoire SPMS, UMR 8580, Centrale Supelec, CNRS, Université Paris-Saclay, Grande Voie des Vignes, Chatenay-Malabry, France 3Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA 4Department of Applied Physics, Stanford University, Stanford, California 94305, USA 5Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA (Received 27 March 2015; revised manuscript received 5 May 2015; published 20 May 2015)