title: Ferroelectric Sm-doped BiMnO3 thin films with ferromagnetic transition temperature enhanced to 140 K.
abstract: A combined chemical pressure and substrate biaxial pressure crystal engineering approach was demonstrated for producing highly epitaxial Sm-doped BiMnO(3) (BSMO) films on SrTiO(3) single crystal substrates, with enhanced magnetic transition temperatures, TC up to as high as 140 K, 40 K higher than that for standard BiMnO(3) (BMO) films. Strong room temperature ferroelectricity with piezoresponse amplitude, d(33) = 10 pm/V, and long-term retention of polarization were also observed. Furthermore, the BSMO films were much easier to grow than pure BMO films, with excellent phase purity over a wide growth window. The work represents a very effective way to independently control strain in-plane and out-of-plane, which is important not just for BMO but for controlling the properties of many other strongly correlated oxides.
authors.affiliation: Department of Materials Science, University of Cambridge , 27 Charles Babbage Road, Cambridge, CB3 0FS, U.K.
authors.forename: Eun-Mi
authors.initials: EM
authors.lastname: Choi
authors.forename: Ahmed
authors.initials: A
authors.lastname: Kursumovic
authors.forename: Oon Jew
authors.initials: OJ
authors.lastname: Lee
authors.forename: Josée E
authors.initials: JE
authors.lastname: Kleibeuker
authors.forename: Aiping
authors.initials: A
authors.lastname: Chen
authors.forename: Wenrui
authors.initials: W
authors.lastname: Zhang
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
authors.forename: Judith L
authors.initials: JL
authors.lastname: MacManus-Driscoll
keywords: BiMnO3; PLD; film; multiferroic