Effect of pressure on electrical resistance of Pd82−xVxSi18 metallic glasses

Measurements have been made of the effect of hydrostatic pressure to 10 kbar, at room ambient temperatures, on the electrical resistance of a series of Pd_82?xV_xSi₁₈ metallic glasses with x varying from 0 to 6 at.%. These glasses show positive temperature coefficients of resistance at low vanadium concentrations, varying monotonically to negative coefficients at high concentrations. It is found that, independent of vanadium concentration, the pressure coefficient of resistance of all the glasses is identically zero to one part in 10⁴, indicating that the pressure derivative of the logarithm of the resistivity is exactly equal to the negative of the linear compressibility. The implication of this result with respect to theoretical models is discussed; only the Ziman liquid metal model provides a consistent explanation.