Kerr magnetometer based on a differential amplifier

The Kerr magnetometer with differential amplifier which in contrast to lock-in detection technique, is especially recommended for rapid measurements up to 1.5 kHz is described. The calibration of the Kerr rotation angle was performed on the standard sputtered films (with thickness from 2 nm to 50 nm) and Fe-wedge sample, prepared by MBE-technique, in the range of thickness from 1ML to 50 ML of Fe. The test measurements on spin valve structure were also performed.