Effect of Temperature on the Hall Coefficient of Indium and Indium-Rich Solid Solutions

概要

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The variations of the Hall coefficients R_H of indium and indium-rich alloys (In-Pb, In-Cd, In-Tl and In-Hg) have been determined as functions of temperature. R_H for pure indium varies from +0.979 at -195.8℃ to -1.020 × 10^<-11>(m^3/coul.) at 110℃, the sign being reversed at about 0℃. The values of R_H for In-Pb, In-Tl and In-Cd deviate to the negative side at about -195.8℃. At temperatures higher than about 0℃ R_H for these alloys show variations similar to that in pure indium. The relation of the observed behavior of R_H to that of the axial ratio c/a is discussed. An attempt is made to explain it in terms of the anisotropy of electronic relaxation times τ_p and τ_i, which are due to phonon and impurity scatterings respectively. The temperature dependences of R_H in aluminium and lead are similar to that in indium. It seems that the temperature dependence of R_H in these metals is chiefly determined by the nature of the carriers in the 2nd Brilloin zone.
社団法人日本物理学会の論文
1967-01-05