Magnetic effects at the interface between non-magnetic oxides.

By A. Brinkman, M. Huijben, Maarten van Zalk, J. Huijben, U. Zeitler, J. Maan, W. G. Wiel, G. Rijnders, D. Blank, H. Hilgenkamp. Nature Materials, 2007

1,369 citations recorded by the source corpus.

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.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/fc416973d5dfc4dbba86a07e5011da653860435b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Condensed Matter Physics

1. M. Kawasaki
2. N. Reyren
3. S. Banerjee
4. N. Nagaosa
5. M. Randeria
6. Ramamoorthy Ramesh
7. O. Erten
8. Y. Tokura

In Electronic, Optical and Magnetic Materials

1. M. Kawasaki
2. J. Coey
3. N. Nagaosa
4. Ramamoorthy Ramesh
5. J. Triscone
6. Y. Tokura

In Materials Chemistry

1. A. Ohtomo
2. Ramamoorthy Ramesh
3. J. Coey
4. Marta D. Rossell
5. N. Nagaosa
6. R. Ashoori
7. J. Mannhart
8. M. Kawasaki

Citations in the corpus

• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface (2011, background): “Bulk magnetization and magnetoresistance measurements also indicate some form of magnetism depending on preparation condition”
• Origin of the Two-Dimensional Electron Gas at LaAlO 3 /SrTiO 3 Interfaces: The Role of Oxygen Vacancies and Electronic Reconstruction (2013, background): “The room-temperature carrier density of ∼10(14) cm−2 is comparable to that of unannealed crystalline LAO/STO heterostructures [8,19], which were directly cooled down to room temperature in the deposition oxygen pressure after high temperature growth.”
• Ferromagnetic exchange, spin–orbit coupling and spiral magnetism at the LaAlO3/SrTiO3 interface (2013, background): “found to vary from sample to sample [4], we think that this second explanation is much more viable.”
• Emergent phenomena at oxide interfaces. (2012, background): “There is indeed a very strong dependence of the interface carrier density on the oxygen partial pressure during growt”