Hall Effect of Silver Ions in RbAg4I5Single Crystals

The Hall effect of the high ionic conductor Rb${\mathrm{Ag}}_4$ ${\mathrm{I}}_5$ was studied from 0 to 40°C. By comparison with the results on photoexcited carriers, it is determined that the origins of Hall signals in R${\mathrm{Ag}}_4$ ${\mathrm{I}}_5$ are the mobile silver ions. The value of Hall mobility is about 0.05 ${\mathrm{cm}}^2$ ${\mathrm{V}}^{-1\mathrm{}}$ ${\sec }^{-1\mathrm{}}$ at room temperature, which is about 30 times as large as that of the ions in NaCl at 780°C previously obtained by Read and Katz.