Effect of induced disorder on low temperature resistivity of some non-magnetic and magnetic metallic glasses

The low temperature resistivity of some transition metal-metalloid metallic glasses has been studied. Plastic deformation, quenching rate and thermal annealing have been used to modify the defect state of the specimens. Effec t of disorder has been studied on magnetic and non-magnetic metallic glasse s. A detailed analysis of the resistivty data of Co65Fe5Mo2Si16B12 evidence s the existence of weak localization effects. The plastic deformation or a higher quenching rate from melt results in shift in the resistivity minima to lower temperature, annealing of the specimen has an opposite effect. Thi s effect may be understood in terms of an increase in the strength of elect ron-phonon interaction under increasing disorder. The associated changes in the mass density may also modify the weak localization effects. (C) 2001 E lsevier Science B.V. All rights reserved.