Magnetoresistance of the p-(InSb + MnSb)/n-InSb diode structure

Abstract

The p-(InSb + MnSb)/n-InSb diode structures have been produced by the pulse laser deposition method on the n-InSb single-crystal substrates from the targets in which positive giant magnetoresistance at 298 K in forward bias and at the application of the magnetic field of 0.15 T was observed. The I–V characteristics of the diode structure changed under the application of a magnetic field both in the plane of the structure, and perpendicular to it at the room temperature. The current magnitude of diode at a voltage of 1 V in the magnetic field 0.15 T, parallel and perpendicular to the plane of the diode structure, decreased by more than by 3 times from 28 to 8.2 mA and than by 10 times from 28 to 2.7 mA accordingly The values of parasitic resistance, the size of magneto-resistive effect for the p-(InSb + MnSb)/n-InSb diode have been defined without application of a field and in the presence of the 0.15 T magnetic field in the plane and perpendicular to the transition plane. The spin polarization of carriers has been calculated.