title: Large anisotropy in colossal magnetoresistance of charge orbital ordered epitaxial Sm(0.5)Ca(0.5)MnO(3) films.
abstract: We investigated the structure and magnetotransport properties of Sm(0.5)Ca(0.5)MnO(3) (SCMO) films epitaxially grown on (011)-oriented SrTiO(3) substrates, which exhibited clear charge/orbital ordering transition. A significant anisotropy of ∼1000 in the colossal magnetoresistance (CMR) effect was observed in the films with a thickness between 50 and 80 nm, which was distinctly different from the basically isotropic CMR effect in bulk SCMO. The large anisotropy in the CMR can be ascribed to the intrinsic asymmetric strain in the film, which plays an important role in tuning the spin-orbit coupling in manganite films. The origin of the peculiar CMR effect is discussed.
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China. Fuel cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde, Denmark.
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Chen
authors.forename: J R
authors.initials: JR
authors.lastname: Sun
authors.forename: J L
authors.initials: JL
authors.lastname: Zhao
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: B G
authors.initials: BG
authors.lastname: Shen
authors.forename: N
authors.initials: N
authors.lastname: Pryds