title: Magnetic effects at the interface between non-magnetic oxides.
abstract: The electronic reconstruction at the interface between two insulating oxides can give rise to a highly conductive interface. Here we show how, in analogy to this remarkable interface-induced conductivity, magnetism can be induced at the interface between the otherwise non-magnetic insulating perovskites SrTiO3 and LaAlO3. A large negative magnetoresistance of the interface is found, together with a logarithmic temperature dependence of the sheet resistance. At low temperatures, the sheet resistance reveals magnetic hysteresis. Magnetic ordering is a key issue in solid-state science and its underlying mechanisms are still the subject of intense research. In particular, the interplay between localized magnetic moments and the spin of itinerant conduction electrons in a solid gives rise to intriguing many-body effects such as Ruderman-Kittel-Kasuya-Yosida interactions, the Kondo effect and carrier-induced ferromagnetism in diluted magnetic semiconductors. The conducting oxide interface now provides a versatile system to induce and manipulate magnetic moments in otherwise non-magnetic materials.
authors.affiliation: Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands. a.brinkman@utwente.nl
authors.forename: A
authors.initials: A
authors.lastname: Brinkman
authors.forename: M
authors.initials: M
authors.lastname: Huijben
authors.forename: M
authors.initials: M
authors.lastname: van Zalk
authors.forename: J
authors.initials: J
authors.lastname: Huijben
authors.forename: U
authors.initials: U
authors.lastname: Zeitler
authors.forename: J C
authors.initials: JC
authors.lastname: Maan
authors.forename: W G
authors.initials: WG
authors.lastname: van der Wiel
authors.forename: G
authors.initials: G
authors.lastname: Rijnders
authors.forename: D H A
authors.initials: DH
authors.lastname: Blank
authors.forename: H
authors.initials: H
authors.lastname: Hilgenkamp