Abstract
The transverse magnetoresistance (MR) of YBa 2Cu 3O 7 thin films is analyzed with respect to the geometric magnetoresistance (GEMR), which is introduced to the measurements in a transverse magnetic field by a finite length-to-width ratio of the sample structure. We show that this effect becomes important in high-temperature superconductors (HTSC) at temperatures far above T c in sample geometries typically used for single crystal measurements. The GEMR adds to the physical MR, which may lead to a misinterpretation of the high temperature part of the MR. Measurements of the MR and the Hall effect employing two different sample geometries, patterned in the same YBa 2Cu 3O 7 thin film, which allow for a separation of GEMR from physical MR are presented.
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