Journal ArticleDOI
Magnetization Studies on Tb-Fe and Tb-Fe-Co Thin Films
P. Rajasekhar,G. Markandeyulu +1 more
TLDR
Magnetization studies were carried out on TbFe and Tb-Fe-Co thin films, prepared using magnetron co-sputtering technique as discussed by the authors, and all the films were observed to exhibit planar anisotropy at 25 K.Abstract:
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.read more