Details

Autor(en) / Beteiligte

• Brinkman, A
• Huijben, M
• van Zalk, M
• Huijben, J
• Zeitler, U
• Maan, J. C
• van der Wiel, W. G
• Rijnders, G
• Blank, D. H. A
• Hilgenkamp, H

Titel

Magnetic effects at the interface between non-magnetic oxides

Ist Teil von

• Nature materials, 2007-07, Vol.6 (7), p.493-496

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.