title: Designing new ferrite/manganite nanocomposites.
abstract: Two kinds of nanocomposites of transition metal oxides were synthesized and investigated. Each nanocomposite comprises nanoparticles of La0.67Ca0.33MnO3 and CoFe2O4 in similar volume fractions, however arranged with different morphologies. The temperature-dependent magnetic and electrical properties of the two systems are found to greatly differ, suggesting different degrees of interaction and coupling of their constituents. This is confirmed by magnetic field-dependent experiments, which reveal contrasted magnetization reversal and magnetoresistance in the systems. We discuss this morphology-physical property relationship, and the possibility to further tune the magnetism and magneto-transport in such nanocomposites.
authors.affiliation: Department of Engineering Sciences, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden. roland.mathieu@angstrom.uu.se and Istituto di Struttura della Materia - CNR, 00015 Monterotondo Scalo (RM), Italy. davide.peddis@ism.cnr.it.
authors.forename: G
authors.initials: G
authors.lastname: Muscas
authors.affiliation: Department of Engineering Sciences, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden. roland.mathieu@angstrom.uu.se.
authors.forename: P
authors.initials: P
authors.lastname: Anil Kumar
authors.affiliation: Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica, Università Politecnica delle Marche, via Brecce Bianche 12, Ancona, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Barucca
authors.affiliation: Dipartimento di Fisica, Università di Cagliari, S.P. Monserrato-Sestu km 0.700, 09042, Monserrato, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Concas
authors.affiliation: Istituto di Struttura della Materia - CNR, 00015 Monterotondo Scalo (RM), Italy. davide.peddis@ism.cnr.it.
authors.forename: G
authors.initials: G
authors.lastname: Varvaro
authors.affiliation: Department of Engineering Sciences, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden. roland.mathieu@angstrom.uu.se.
authors.forename: R
authors.initials: R
authors.lastname: Mathieu
authors.affiliation: Istituto di Struttura della Materia - CNR, 00015 Monterotondo Scalo (RM), Italy. davide.peddis@ism.cnr.it.
authors.forename: D
authors.initials: D
authors.lastname: Peddis