Original scientific paper
The use of hydrogen as a probe to study quantum interference at defects in metallic glasses
Ivan Kokanović
; Physics Department, Faculty of Science, University of Zagreb, Croatia
Boran Leontić
; Physics Department, Faculty of Science, University of Zagreb, Croatia
Jagoda Lukatela
; Institute of Physics of the University, Zagreb, Croatia
Abstract
The electrical resistivity and the magnetic susceptibility of hydrogen-doped disordered Zr-Ni alloys have been measured at temperatures between 1.7 K and 300 K and in magnetic fields up to 6 T for various dopant concentrations. The temperature and magnetic field dependence of the measured properties have been analysed using the theoretical models of weak-localization and electron-electron interaction in disordered three-dimensional conductors. Doping the samples with hydrogen increases the disorder. Thus, we have found that hydrogen strongly enhances quantum interference at deffects. As a result the effective diffusion constant of the electrons and the screening of the Coulomb interaction are reduced. This leads to an increase in resistivity, suppression of the superconducting transition temperature, and to enhanced spin susceptibility at low temperatures. The Maki-Thompson interaction as well as the spin-orbit contribution to the magnetoresistivity are also depressed.
Keywords
Hrčak ID:
299271
URI
Publication date:
1.2.1992.
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