Angular Dependence of the Magnetoresistance of the SrTiO /LaAlO Interface

We study the magnetoresistance (MR) of the quasi-2-D electron liquid at the interface that forms between SrTiO 3 and LaAlO 3 as a function of the magnitude and orientation of the magnetic field. We find that at T ¿ 60 K, the MR is described by a + b cos 2 ¿ + c sin 2 ¿ cos 2 ¿, where ¿ is the angle...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2010-06, Vol.46 (6), p.1630-1632
Main Authors: Seri, S., Shimshoni, E., Paetel, S., Mannhart, J., Klein, L.
Format: Article
Language:English
Subjects:
2-D electron liquid
Electrons
Hall effect
Interface phenomena
Kohler's rule
Magnetic fields
Magnetic materials
Magnetism
Magnetoresistance
Physics
Pulsed laser deposition
Scattering
Temperature dependence
Temperature distribution
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Summary:We study the magnetoresistance (MR) of the quasi-2-D electron liquid at the interface that forms between SrTiO 3 and LaAlO 3 as a function of the magnitude and orientation of the magnetic field. We find that at T ¿ 60 K, the MR is described by a + b cos 2 ¿ + c sin 2 ¿ cos 2 ¿, where ¿ is the angle between the field and the film normal and ¿ is the angle between the in-plane component of the field and the current. For ¿ = 0° (field perpendicular to the plane), we show that the MR obeys Kohler's rule while for ¿ = 90° (field in the plane) the MR is significantly smaller, and it is almost temperature independent, suggesting it is dominated by interface scattering.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2010.2042687