Abstract
Abstract Thermal conductivity data between 1.8 and 300 K are reported for K 1− x Li x TaO 3 (0≤ x ≤0.03) and KTa 1− x Nb x O 3 (0≤ x ≤0.16) single crystals. Whereas lightly Li- and Nb-doped crystals exhibit relaxor-like behavior in dielectric susceptibility, they do not show the glasslike thermal transport found in conventional relaxors such as PbMg 1/3 Nb 2/3 O 3 and Na 1/2 Bi 1/2 TiO 3 . The lack of glasslike behavior in K 1− x Li x TaO 3 and KTa 1− x Nb x O 3 is confirmed by the absence of temperature-linear contribution in heat capacity.
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