engleski

The magnetic susceptibility of hydrogen-doped partially crystalline (Zr76Ni24)1-xHx metallic glasses

The magnetizations of Zr76Ni24 metallic glass and hydrogen doped partially crystalline (Zr76Ni24)1-xHx metallic glasses have been measured in the temperature range from 10 K up to 300 K and magnetic fields up to 2 T for various dopant concentrations (x=0, 0.024, 0.043, 0.054). It is found that the samples are paramagnetic and magnetic susceptibility at a room-temperature shows a nonmonotonic behaviour upon hydrogenation. The values of the magnetic susceptibility of the hydrogen-doped partially crystalline (Zr76Ni24)1-xHx metallic glasses are reduced with increasing hydrogen content up to x=0.043 whereas for x=0.054, an enhancement of the magnetic susceptibility has been revealed. The magnetic susceptibility is weakly temperature dependent down to 110 K, below which an increase is observed. A shallow minimum exists between 90 K and 120 K. The form and magnitude of the observed temperature dependence of the magnetic susceptibility are well accounted for by the sum of the quantum corrections to the magnetic susceptibility. Hydrogen reduces the electronic diffusion constant and to influence strongly the quantum interference at defects slowing down the spin diffusion and enhancing the magnetic susceptibility in the temperature range from 110K down to 10 K.

Disordered systems; Galvanomagnetic effects; Hydrogen; Quantum localization; Superconductivity

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