David B. Mitzi
Journal of Materials Chemistry
A negative-temperature coefficient (=-1d dT) of electrical resistivity, (T), has been observed in many amorphous and disordered metallic conductors. The origin of this anomalous temperature dependence of resistivity is still unclear. To explain the negative- anomaly, there are two theoretical approaches (i.e., the Ziman-type theory and the structural Kondo model) currently discussed in the literature. In an attempt to distinguish between these two approaches the resistivity of several liquid-quenched amorphous La-based alloy systems containing Al, Au, Ga, or Ge, has been analyzed as a function of composition and temperature. It is concluded that the resistivity data are inconsistent with the Ziman-type theory and are in favor of the structural Kondo-type model. This conclusion is based on the fact that (1) resistivity varies as -lnT (T100 K) in alloys with negative, and (2) the occurrence of negative is independent of the valence of the La-based alloys. © 1980 The American Physical Society.
David B. Mitzi
Journal of Materials Chemistry
Oliver Schilter, Alain Vaucher, et al.
Digital Discovery
Frank R. Libsch, Takatoshi Tsujimura
Active Matrix Liquid Crystal Displays Technology and Applications 1997
Douglass S. Kalika, David W. Giles, et al.
Journal of Rheology