Spin-glass transition in amorphous Tb-Si films.
01 January 1986
A recent study established that disordered Tb exhibits a spin- glass transition with a spin-glass freezing temperature ranging from 183K to 53K, the lowest temperature corresponding to the greatest degree of atomic disorder. This result is confirmed by the present study of amorphous Tb-Si alloys which demonstrates that at low Si content the spin-glass properties of Tb-(90)Si (10) are essentially identical to those of the most distorted (quasi-amorphous) pure Tb film. Furthermore, the spin- glass properties of Tb-Si alloys with Si content up to 50 at.% were studied by ac and low-field dc susceptibility measurements with special emphasis on the composition Tb(5)Si(3) which is ferromagnetic in the crystalline state.