Ptmn has practically been used as anti - ferromagnetic layer to pin ferromagnetic layers because of its large exchange bias , high blocking temperature and excellent thermal stability . on the other hand , ptmn films deposited by magnetron sputtering without substrate heating require a relatively high temperature post - deposition annealing in magnetic field to induce a unidirectional exchange field hes 由于ptmn反鐵磁材料具有大的交換偏置,比較高的blocking溫度和較好的熱穩(wěn)定性,在自旋閥結(jié)構(gòu)中ptmn已經(jīng)在實(shí)際應(yīng)用上用來釘扎鐵磁層。