Low-frequency magnetic noise in micron-scale magnetic tunnel junctions

Abstract

Measurements of low-frequency magnetic noise in ferromagnetic tunnel junctions (MTJ) were carried out. The measurements were facilitated by the linear relation between the conductance and the magnetization. Overall, the results indicate that to curtail the low-frequency noise in MTJs, it is importance to enhance the thermal stability of the magnetization by reducing the activated motion of domain walls and the associated susceptibility.