Indium-rich Alloys Research Articles

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

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°C to -1.020×10 -11 (m 3 /coul.) at 110°C, the sign being reversed at about 0°C. The values of R H for In-Pb, In-Tl and In-Cd deviate to the negative side at about -195.8°C. At temperatures higher than about 0°C 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.

Phase Change of the Indium Rich Alloys

The stability of a f.c.c. phase and two f.c.t. phases, one has the axial ratio more than unity and the other less than unity, of In–Cd, In–Sn, In–Hg and In–Pb are discussed. On the basis of the nearly free electron model, the internal energies for these phases are calculated. The phase which has the least internal energy in any electron/atom region can actually exist. The calculated regions of these phases agree comparatively well with the actual phase diagram. A reasonable explanation on the change in the transport properties at the phase boundaries is also given by the model.

Erratum: “The Conventional Transport Properties of Primary Solid Solutions. I. Indium Rich Alloys”

Erratum: “The Conventional Transport Properties of Primary Solid Solutions. I. Indium Rich Alloys”

The Conventional Transport Properties of Primary Solid Solutions. I. Indium Rich Alloys.

The conventional transport properties–the Hall coefficient, the electrical resistivity and the thermoelectric power in five indium-rich solid solutions, In-Cd, In-Sn, In-Hg, In-Tl and In-Pb were measured in the range of 0∼5 and 0∼10 at. % of solute at 110°C. The electrical resistivity of these alloys varies linearly with the solute concentration in the range of measurement. The Hall coefficients are small negative value compared with other ordinary metals such as copper, and decrease linearly with the solute concentration except In-Cd system, for which a minimum is found at about 5 at. % Cd. The thermoelectric power of these alloys also decreases from a small positive value in indium (+0.82 µV/deg) toward the negative direction, and there is a minimum for In-Cd system at 5 at. % Cd. The small value of the Hall coefficients, the linear changes of them, and the fall of the thermoelectric power with the solute concentration can be explained by assuming the existence of two types of carriers; one is electron-...

Indium-rich indium-magnesium and indium-lithium alloys

Abstract For comparison with the results obtained from alloys of indium with solute metals from Group IIB of the periodic table, the lattice spacings of indium-magnesium and indium-lithium alloys have been measured. Although the results show an unexpected scatter, they establish that neither magnesium nor lithium cause a marked axial ratio decrease. A possible reason for this behaviour is briefly discussed. The solid solubility of magnesium in indium at room temperature lies between 35 and 40 atm% of magnesium. The primary solid solution enters into equilibrium with the previously observed face-centred cubic intermediate solid solution (denoted β) above 275°C, and with the ordered form of the same intermediate phase below this temperature. There is a peritectic reaction β+liquid = (indium-rich primary solid solution) at 333.5°C.

An X-ray examination of the indium-rich alloys of the systems indium + lead and indium + mercury

An X-ray examination of the indium-rich alloys of the systems indium + lead and indium + mercury