title: Electronic and magnetic structure of LaSr-2×4 manganese oxide molecular sieve nanowires.
abstract: In this study we combine scanning transmission electron microscopy, electron energy loss spectroscopy and electron magnetic circular dichroism to get new insights into the electronic and magnetic structure of LaSr-2×4 manganese oxide molecular sieve nanowires integrated on a silicon substrate. These nanowires exhibit ferromagnetism with strongly enhanced Curie temperature (T c >500 K), and we show that the new crystallographic structure of these LaSr-2×4 nanowires involves spin orbital coupling and a mixed-valence Mn3+/Mn4+, which is a must for ferromagnetic ordering to appear, in line with the standard double exchange explanation.
authors.affiliation: 1Institut de Ciència de Materials de Barcelona ICMAB,Consejo Superior de Investigaciones Científicas CSIC,08193 Bellaterra,Spain.
authors.forename: Jaume
authors.initials: J
authors.lastname: Gazquez
authors.affiliation: 2Laboratoire Chimie de la Matière Condensée,UMR UPMC-Collège de France-CNRS 7574,Collège de France,11 Place Marcelin Berthelot,75231 Paris,France.
authors.forename: Adrián
authors.initials: A
authors.lastname: Carretero-Genevrier
authors.affiliation: 1Institut de Ciència de Materials de Barcelona ICMAB,Consejo Superior de Investigaciones Científicas CSIC,08193 Bellaterra,Spain.
authors.forename: Martí
authors.initials: M
authors.lastname: Gich
authors.affiliation: 1Institut de Ciència de Materials de Barcelona ICMAB,Consejo Superior de Investigaciones Científicas CSIC,08193 Bellaterra,Spain.
authors.forename: Narcís
authors.initials: N
authors.lastname: Mestres
authors.affiliation: 4Materials Science and Technology Division,Oak Ridge National Laboratory,Oak Ridge,Tennessee 37831,USA.
authors.forename: María
authors.initials: M
authors.lastname: Varela