Magnetic effects at the interface between non-magnetic oxides

Alexander Brinkman, Mark Huijben, M. van Zalk, J. Huijben, U. Zeitler, J.C. Maan, Wilfred Gerard van der Wiel, Augustinus J.H.M. Rijnders, David H.A. Blank, Johannes W.M. Hilgenkamp

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The electronic reconstruction at the interface between two insulating oxides can give rise to a highly conductive interface1,2. Here we show how, in analogy to this remarkable interfaceinduced 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 lowtemperatures, 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 intriguingmany-body effects such as Ruderman–Kittel–Kasuya–Yosida interactions3, the Kondo effect4 and carrier-induced ferromagnetism in diluted magnetic semiconductors5. The conducting oxide interface now provides a versatile system to induce and manipulate magnetic moments in otherwise non-magnetic materials.
Original languageEnglish
Pages (from-to)493-496
Number of pages4
JournalNature materials
Issue number7
Publication statusPublished - 3 Jun 2007


  • EWI-17344
  • IR-58978
  • METIS-242276

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