Magnetization studies were carried out on Tb-Fe and Tb-Fe-Co thin films, prepared using magnetron co-sputtering technique. The films Tb
 25 
Fe
 75 and Tb
 31 
Fe
 69 were found to have perpendicular magnetic anisotropy (PMA) both at 25 and 300 K. In Tb-Fe-Co films, all the films were observed to exhibit planar anisotropy at 25 K, due to the increase of strain-induced anisotropy as a result of large magnetostriction at low temperatures leading to the development of in-plane anisotropy. PMA was observed in the films Tb
 35 
Fe
 37 
Co
 28 
, Tb
 56 
Fe
 25 
Co
 19 
, and Tb
 63 
Fe
 20 
Co
 17 at 300 K. The Curie temperatures (T
 C ) of both TbxFe
 100-x and Tb-Fe-Co films were found to be above room temperature (RT). Observing the Curie temperatures well above the RT, with the existence of PMA at RTs, is an interesting object in these films to find in magnetic data storage applications.

최용석

Papers

비정질 Sm - Fe - (B) 거대자기변형박막의 자기적 성질

The magnetic properties of Tb-Fe-(B) thin films fabricated by RF magnetron sputtering