Study of the relationship between scalability of MTJ and switching field using SPM

The switching field variation in terms of the sizes of sub-micron MTJ cells was studied by measuring the I-V characteristics of MTJ cells and hysteresis I-H loop, obtained by measuring the tunneling current with sweeping magnetic field. The observed switching field using SPM was compared to the results obtained through conventional methods. The measured currents with respect to applied magnetic fields reveal hysteretic behavior with two stable states. It was also observed that the switching field of MTJ cell increase as the size of MTJ cell decreases due to the depolarization.