Dielectric and Electrooptic Investigations in the Nematic Phase of 5‐n‐Pentyl‐2‐[4‐n‐nonyloxyphenyl]‐1,3‐dioxane

The dielectric constant and the dielectric loss of 5‐n‐pentyl‐2‐[4‐n‐nonyloxyphenyl]‐1,3‐dioxane were investigated in the region of 0.1 to 10 MHz. An isotropy temperature was detected, at which the static dielectric anisotropy Δε 01 = 0. Using both the Freedericksz and the DAP effect, we measured the frequency dependence of the threshold voltage U 0 and compared the results with those of the dielectric measurements. In the case of DAP effect we could find two different types of dispersions curves of U 0 .