Galvanomagnetic properties of the Al1-xSix nonequilibrium substitutional solid solutions

Galvanomagnetic characteristics of the Al1-xSix solid solutions (x<12 at. % ) have been studied within a broad range of temperatures (1.8-290 K) and ma gnetic fields (up to 15 T). An anomaly in the concentration dependence of t he Hall coefficient R-H (x, T = 290 K) has been revealed near the boundary of absolute instability (x<8.5 at. %) of compounds in the Al1-xSix series. The variation of the Hall coefficient and of the magnetoresistance in the A l1-xSix series at low (T<77 K) temperatures is analyzed within models takin g into account the anisotropy in conduction-band electron scattering. (C) 1 999 American Institute of Physics. [S1063-7834(99)00101-X].