Magneto-Optic Kerr Imaging Technique for Localizing Magnetic Failures

Abstract

Abstract The paper describes the Magneto-Optic Kerr (MOKE) Imaging technique for imaging magnetic response of soft magnetic materials at external magnetic field. This method can be applied for investigating domain wall formations and propagation, localizing magnetic failing sites, and analyzing hysteresis response of the films at varying magnetic field strengths. The paper describes some use cases of this technique for failure analysis in magnetic sensors, whereby in some cases delayering have been developed prior to imaging.