| Title |
A Study of Glass Forming Ranges and Crystallization Reactions of Co - Evaporated Tb - Fe and Gd - Fe Alloy Films |
| Authors |
이성래(Seong Rae Lee); 김종한(Jong Han Kim) |
| Abstract |
Structures, crystallization reactions and kinetics of co-evaporated Tb-Fe and Gd-Fe alloy films were studied by transmission electron microscopy and differential thermal analysis. Amorphous films were formed for the Tb-Fe alloy with 24 to 55 at5 Tb. Alloy films with up to 24 at% Tb were composed of α-Fe microcrystals dispersed in an amorphous matrix. Alloy films with more than 55 at%Tb content some α-Tb crystals. The phenomena of preferential crystallization of α-Fe and α-RE microcrystals were interpreted using a hypothetical metastable eutectic system with of α-Fe and α-RE phases. The activation energies for the crystallization of the Tb-Fe and the Gd-Fe alloy films were the largest at near the composition of the Laves phase, TbFe₂ or GdFe₂. |