title: Multiferroic phase transition near room temperature in BiFeO3 films.
abstract: In multiferroic BiFeO(3) thin films grown on highly mismatched LaAlO(3) substrates, we reveal the coexistence of two differently distorted polymorphs that leads to striking features in the temperature dependence of the structural and multiferroic properties. Notably, the highly distorted phase quasiconcomitantly presents an abrupt structural change, transforms from a standard to a nonconventional ferroelectric, and transitions from antiferromagnetic to paramagnetic at 360±20 K. These coupled ferroic transitions just above room temperature hold promises of giant piezoelectric, magnetoelectric, and piezomagnetic responses, with potential in many applications fields.
authors.affiliation: Unité Mixte de Physique CNRS/Thales, Campus de l'Ecole Polytechnique, 1 avenue Fresnel, 91767 Palaiseau, France.
authors.forename: I C
authors.initials: IC
authors.lastname: Infante
authors.forename: J
authors.initials: J
authors.lastname: Juraszek
authors.forename: S
authors.initials: S
authors.lastname: Fusil
authors.forename: B
authors.initials: B
authors.lastname: Dupé
authors.forename: P
authors.initials: P
authors.lastname: Gemeiner
authors.forename: O
authors.initials: O
authors.lastname: Diéguez
authors.forename: F
authors.initials: F
authors.lastname: Pailloux
authors.forename: S
authors.initials: S
authors.lastname: Jouen
authors.forename: E
authors.initials: E
authors.lastname: Jacquet
authors.forename: G
authors.initials: G
authors.lastname: Geneste
authors.forename: J
authors.initials: J
authors.lastname: Pacaud
authors.forename: J
authors.initials: J
authors.lastname: Íñiguez
authors.forename: L
authors.initials: L
authors.lastname: Bellaiche
authors.forename: A
authors.initials: A
authors.lastname: Barthélémy
authors.forename: B
authors.initials: B
authors.lastname: Dkhil
authors.forename: M
authors.initials: M
authors.lastname: Bibes