title: Giant and reversible extrinsic magnetocaloric effects in La0.7Ca0.3MnO3 films due to strain.
abstract: Large thermal changes driven by a magnetic field have been proposed for environmentally friendly energy-efficient refrigeration, but only a few materials that suffer hysteresis show these giant magnetocaloric effects. Here we create giant and reversible extrinsic magnetocaloric effects in epitaxial films of the ferromagnetic manganite La(0.7)Ca(0.3)MnO(3) using strain-mediated feedback from BaTiO(3) substrates near a first-order structural phase transition. Our findings should inspire the discovery of giant magnetocaloric effects in a wide range of magnetic materials, and the parallel development of nanostructured bulk samples for practical applications.
authors.affiliation: Department of Materials Science, University of Cambridge, Cambridge, CB2 3QZ, UK.
authors.forename: X
authors.initials: X
authors.lastname: Moya
authors.forename: L E
authors.initials: LE
authors.lastname: Hueso
authors.forename: F
authors.initials: F
authors.lastname: Maccherozzi
authors.forename: A I
authors.initials: AI
authors.lastname: Tovstolytkin
authors.forename: D I
authors.initials: DI
authors.lastname: Podyalovskii
authors.forename: C
authors.initials: C
authors.lastname: Ducati
authors.forename: L C
authors.initials: LC
authors.lastname: Phillips
authors.forename: M
authors.initials: M
authors.lastname: Ghidini
authors.forename: O
authors.initials: O
authors.lastname: Hovorka
authors.forename: A
authors.initials: A
authors.lastname: Berger
authors.forename: M E
authors.initials: ME
authors.lastname: Vickers
authors.forename: E
authors.initials: E
authors.lastname: Defay
authors.forename: S S
authors.initials: SS
authors.lastname: Dhesi
authors.forename: N D
authors.initials: ND
authors.lastname: Mathur