Correlation between the extraordinary Hall constant and electrical resistivity minima in Co-rich metallic glasses

摘要

The Hall effect has been studied in some Co-rich ferromagnetic metallic glasses which show resistivity (ρ) minima at low temperatures. It is found that the extraordinary Hall constant (R_s) shows a corresponding minimum. The scaling relation R_s ～褈n holds with n approx = 2 showing the dominance of quantum transport in these high-resistive disordered systems. The temperature dependences of magnetization and electrical resistivity are also interpreted in terms of existing theories.