Transverse biased initial susceptibility measurements of magnetization reversal in Fe/MgO(100) thin films

Transverse biased initial susceptibility (TBIS) measurements were petrol med on Fe(100)/MgO(100) thin films. using a magnetooptical Kerr effect system. A peak detected in the TBIS curve when the magnetic field is applied along one of the easy axes, corresponding to a small step in the hysteresis loop, is associated with the uniaxial in-plane anisotropy superimposed on the crystalline biaxial. We proved that TBIS is a suitable and sensitive technique for the study of this phenomenon, and provides an accurate description of the magnetization reversal process.