Ye, P and Weiss, Dieter and Gerhardts, R and Nickel, H (1997) Magnetoresistance oscillations induced by periodically arranged micromagnets. Journal of Applied Physics 81, p. 5444.
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Probing magnetic fields can be done, e.g., by employing the well established Hall effect. Alternatively, we make use of the ballistic motion of electrons in high mobility two-dimensional electron systems (2DES) to probe electrically the stray field of periodically arranged micomagnets. We investigate the magnetoresistance of the 2DES underneath arrays of magnetic strips and magnetic dots having periods between 500 nm and 1 µm. The periodic stray field gives rise to pronounced oscillations of the resistivity as a function of a homogeneous (weak) magnetic field. The magnetization orientation of the dots and strips can be aligned in different directions with respect to the current flow through the device. The observed magnetoresistance depends characteristically on the magnetization direction and can be understood in terms of the stray field pattern probed by the electrons.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||25 May 2009 13:20|
|Last Modified:||05 Aug 2009 13:57|