Search

The relative depolarized scattering strength and the coherence length anisotropy have been measured in a series of p‐N‐alkoxybenzylidene p‐n‐butylanilines with alkyl chain length n=1,2,4,7, and 8. All compounds appear to obey mean‐field theory. The depolarized scattering strength at a given reduced temperature (T−T*)/T* decreases with increasing chain length, whereas the free‐energy parameter L2 that characterizes the anisotropy is roughly constant. There is no apparent modification in the observed pretransitional effects when the transition changes from isotropic‐to‐nematic (n

p‐Type conductivity and stored electron charge densities as large as 1.3 × 10−7 coul/cm2 have been observed in high‐resistivity CdS crystals. These properties were studied by photovoltaic, photopolarization, and thermo‐electric power measurements.