Abstract
The magnetic susceptibilities, resistivities, and Hall coefficients of amorphous ${\mathrm{Ni}}_{0.80\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Cr}}_{\mathit{x}}$${\mathrm{P}}_{0.20}$ (0.00\ensuremath{\le}x\ensuremath{\le}0.40) alloys are reported. A sign change with temperature of the Hall coefficient for a single paramagnetic amorphous alloy that correlates with the temperature-dependent valence susceptibility has been observed (x=0.20), indicating that an extraordinary contribution to ${\mathit{R}}_{\mathit{H}}$ is responsible for the positive Hall effect in these paramagnetic alloys. Also, an unexplained relatively large contribution to ${\mathit{R}}_{\mathit{H}}$ that is linear in T has been observed in some of these alloys. A gradual change in magnetic properties with composition from large cluster-dominant phase to Kondo-impurity phase has been observed.
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