Ionic conduction in anion substituted CuBrTe
Beeken RB, Haase AT, Hoerman BH, Sulzer SE
SOLID STATE IONICS 86-8: 83-87, Part 1 (1996).
Abstract:
The fast ion conductor CuBrTe exhibits
structural phase transitions at 230 K and at 351 K. Electrical
conductivities of CuBrxCl1-xTe and CuBrxI1-xTe solid solutions
were measured in an attempt to discern the effect of chemical
substitution on the mobility of Cu+ cations in this compound. In
general, the structural phase transitions are found to be
accompanied by subtle, second-order electrical phase transitions.
In the case of CuBrxCl1-xTe, replacement of Br- with the smaller
Cl- anion leads to an increase in room temperature conductivity
and a corresponding decrease in activation energy beyond that
expected of a proportionate mixing of CuBrTe and CuClTe. By
contrast, replacement of Br- with the larger I- anion in
CuBrxI1-xTe leads to a decrease in room temperature conductivity
and an increase in activation energy proportionate to that
expected of a simple mixing of CuBrTe and CuITe.
Author Keywords:
CuBrTe, CuClTe, CuITe, electrical
conductivity, ionic mobility
KeyWords Plus:
PHASE-TRANSITION, SOLID-SOLUTIONS, CUITE
Addresses:
Beeken RB, UNIV WISCONSIN, DEPT PHYS &
ASTRON, STEVENS POINT, WI 54481.
Publisher:
ELSEVIER SCIENCE BV, AMSTERDAM
IDS Number:
VV764
ISSN:
0167-2738