We have studied the temperature behavior of the buried Glass-Liquid Crystal
Interface for 8CB films of varying thickness deposited into a grated surfa
ce, using grazing incidence X-ray scattering. Our results indicate the pres
ence of both a chevron structure and a structure similar to the helical twi
st-grain-boundary (TGB) phase the evolve as a function of temperature. We f
ind that smectic order is preserved at temperatures well above the smectic
A - nematic transition, especially in films of intermediate thickness. A de
pth analysis of the films indicates that the intensity of the scattering pe
ak increases close near the center of the intermediate thickness films. Thi
s evolution is accompanied by a rotation of the smectic layers due to flow
in the sample.