Some remarks on the applicability of the positron annihilation technique for studying the electronic structure of metallic glasses

Metallic glasses of the composition Fe40Ni40B20, Ni78Si8B14, Fe39Ni39Mo4Si6B12, and Co58Ni10Fe5Si11B16 are studied by means of the angular correlation of the positron gamma quanta and positron lifetime measurements. Results show that positron lifetime and Fermi momentum for all investigated materials do not differ distinctly and crystallization does not substantially change the positron lifetime, the electron momentum distributions, and the chemical ordering and phase inhomogeneity. The annihilation characteristics reflect the averaged effective electronic structure of the investigated metallic glasses