title: EELS tomography in multiferroic nanocomposites: from spectrum images to the spectrum volume.
abstract: Electron Energy Loss Spectroscopy (EELS) in a transmission electron microscope offers the possibility of extracting high accuracy maps of composition and electronic properties through EELS spectrum images (EELS-SI). Acquiring EELS-SI for different tilt angles, a 3D tomographic reconstruction of EELS information can be achieved. In the present work we show that an EELS spectrum volume (EELS-SV), a 4D dataset where every voxel contains a full EELS spectrum, can be reconstructed from the EELS-SI tilt series by the application of multivariate analysis. We apply this novel approach to characterize a nanocomposite material consisting of CoFe2O4 nanocolumns embedded in a BiFeO3 matrix grown on a LaNiO3 buffered LaAlO3 (001) substrate.
authors.affiliation: Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB, Dept. d'Electrònica, Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain. llyedra@el.ub.edu.
authors.forename: Lluís
authors.initials: L
authors.lastname: Yedra
authors.forename: Alberto
authors.initials: A
authors.lastname: Eljarrat
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Rebled
authors.forename: Lluís
authors.initials: L
authors.lastname: López-Conesa
authors.forename: Nico
authors.initials: N
authors.lastname: Dix
authors.forename: Florencio
authors.initials: F
authors.lastname: Sánchez
authors.forename: Sònia
authors.initials: S
authors.lastname: Estradé
authors.forename: Francesca
authors.initials: F
authors.lastname: Peiró