Dynamic properties of MgO/CoFeB based sensors with perpendicular anisotropy

The dynamic response to nanosecond current step of CoFeB/MgO/CoFeB based sensor with different sensitivity is studied in this contribution. The materials stacks are deposited by magnetron sputtering while the sensors are patterned using direct write laser lithography and ion beam milling. It is shown that the sensitivity of the TMR sensors does not affect rise and response time, which determine the sensor bandwidth, but controls the settling time.