Effects of perpendicular bias magnetic fields on hysteresis

non-linearity and sensitivity of spin-valve sensors are investigated by testing the magnetic response（ MR） curves while perpendicularly apply bias magnetic field to sensitive axis. It is found that the hysteresis

non-linearity and sensitivity all decrease with increasing bias field

and sensitivity is inversely proportional to the bias field. The research results can offer the theoretical support for application of spin valve sensors.