Positron Annihilation Study of Structural Relaxation in Amorphous Fe₄₀Ni₄₀B₂₀Alloy

Abstract

Structural relaxation of amorphous Fe40Νi40B20 alloy has been studied by the method of angular correlation of positron annihiJation. Inexpressive changes of the spectra after the annealing for 2 x 10 3 min at 473 K suggest some changes in topological order. The relatively low sensitivity of positron annihilation to the structural relaxation of the amorphous alloy is probably caused by the high density of vacancy-like defects in the alloy.