Amorphous SmTbCo/Cr films with perpendicular anisotropy were successfully prepared by using r.f.magnetron sputtering and the magnetic properties as well as their temperature dependence characteristics were investigated.For sample with composition of(Sm0.286Tb0.714)31Co69/Cr,the saturation magnetization Ms is 330kA/m,the coercivity is 398 kA/m and the the magnetic anisotropy energy is as high as 415kJ/m3.The Curie temperature of this film is 220℃ and the compensation temperature is around room temperatue.The STM images showed that even after 22...