The NiFeCr(4.5nm)/NiFe(10nm)/MgO(4.0nm)/Ta(5.0nm)films were prepared by magnetic sputtering and were annealed in a vacuum furnace with an applied plane field.The anisotropic magnetoresistance(AMR)increases dramatically after the annealing and it reaches to 3.02% after annealing at 400℃.Afterwards,the AMR decreases with a further increase of the heating treatment temperature.The XRD results show that the perfect diffraction peak of NiFe(111)was well presented.At the same time the MgO(111)was presented also a...