title: Magnetic materials. Tilt engineering of spontaneous polarization and magnetization above 300 K in a bulk layered perovskite.
abstract: Crystalline materials that combine electrical polarization and magnetization could be advantageous in applications such as information storage, but these properties are usually considered to have incompatible chemical bonding and electronic requirements. Recent theoretical work on perovskite materials suggested a route for combining both properties. We used crystal chemistry to engineer specific atomic displacements in a layered perovskite, (Ca(y)Sr(1- y))(1.15)Tb(1.85)Fe2O7, that change its symmetry and simultaneously generate electrical polarization and magnetization above room temperature. The two resulting properties are magnetoelectrically coupled as they arise from the same displacements.
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Pitcher
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
authors.forename: Pranab
authors.initials: P
authors.lastname: Mandal
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Dyer
authors.affiliation: Department of Physics, University of Liverpool, Liverpool L69 7ZE, UK.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Alaria
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
authors.forename: Pavel
authors.initials: P
authors.lastname: Borisov
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Niu
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK. m.j.rosseinsky@liv.ac.uk j.b.claridge@liv.ac.uk.
authors.forename: John B
authors.initials: JB
authors.lastname: Claridge
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK. m.j.rosseinsky@liv.ac.uk j.b.claridge@liv.ac.uk.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Rosseinsky