title: Toward Versatile Sr2FeMoO6-Based Spintronics by Exploiting Nanoscale Defects.
abstract: To actualize the high spintronic application potential of complex magnetic oxides, it is essential to fabricate these materials as thin films with the best possible magnetic and electrical properties. Sr2FeMoO6 is an outstanding candidate for such applications, but presently no thin film synthesis route, which would preserve the magnetic properties of bulk Sr2FeMoO6, is currently known. In order to address this problem, we present a comprehensive experimental and theoretical study where we link the magnetic and half metallic properties of Sr2FeMoO6 thin films to lattice strain, Fe-Mo antisite disorder and oxygen vacancies. We find the intrinsic effect of strain on the magnetic properties to be very small, but also that an increased strain will significantly stabilize the Sr2FeMoO6 lattice against the formation of antisite disorder and oxygen vacancies. These defects, on the other hand, are recognized to drastically influence the magnetism of Sr2FeMoO6 in a nonlinear manner. On the basis of the findings, we propose strain manipulation and reductive annealing as optimization pathways for improving the spintronic functionality of Sr2FeMoO6.
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.
authors.forename: Minnamari
authors.initials: M
authors.lastname: Saloaro
authors.affiliation: IFW Dresden , P.O. Box 27 01 16, D-01171 Dresden, Germany.|Institut für Physik, Martin Luther University Halle-Wittenberg , Von-Seckendorff-Platz 1, 06120 Halle, Germany.|Max Planck Institute of Microstructure Physics , Weinberg 2, 06120 Halle, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Hoffmann
authors.affiliation: Institut für Physik, Martin Luther University Halle-Wittenberg , Von-Seckendorff-Platz 1, 06120 Halle, Germany.
authors.forename: Waheed A
authors.initials: WA
authors.lastname: Adeagbo
authors.affiliation: Materials Research Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.
authors.forename: Sari
authors.initials: S
authors.lastname: Granroth
authors.affiliation: Max Planck Institute of Microstructure Physics , Weinberg 2, 06120 Halle, Germany.
authors.forename: Hakan
authors.initials: H
authors.lastname: Deniz
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.
authors.forename: Heikki
authors.initials: H
authors.lastname: Palonen
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.
authors.forename: Hannu
authors.initials: H
authors.lastname: Huhtinen
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.|NanoSpin, Department of Applied Physics, Aalto University School of Science , P.O. Box 15100, FI-00076 Aalto, Finland.
authors.forename: Sayani
authors.initials: S
authors.lastname: Majumdar
authors.affiliation: Materials Research Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.
authors.forename: Pekka
authors.initials: P
authors.lastname: Laukkanen
authors.affiliation: Institut für Physik, Martin Luther University Halle-Wittenberg , Von-Seckendorff-Platz 1, 06120 Halle, Germany.
authors.forename: Wolfram
authors.initials: W
authors.lastname: Hergert
authors.affiliation: Max Planck Institute of Microstructure Physics , Weinberg 2, 06120 Halle, Germany.
authors.forename: Arthur
authors.initials: A
authors.lastname: Ernst
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku , Turku FI-20014, Finland.
authors.forename: Petriina
authors.initials: P
authors.lastname: Paturi
keywords: SFMO; antisite disorder; first-principles; magnetic properties; nanoscale defects; oxygen vacancy; spintronics; strain