Ferroelectric system stresses

Two other important points have to be stressed. The first is that above Tc = 210 K, T2 does not depend on the frequency offset so that the nanocluster dynamics is similar in different parts of the crystal. Below Tc, on the other hand, T2 depends on the frequency offset and the nanocluster dynamics is different in different parts of the crystal, as expected for a two-component system consisting of ferroelectric regions and a spherical glass-type matrix. The second point is that in the FC T2 data around 140-150 K, a second flat T2... 

With a different ferroelectric LC-polymer it was even possible to obtain very homogenous FS-films of thicknesses of only 6 to 16 layers as determined by both optical and X-ray reflectometry (5polymeric films contained a small fraction of polymerizable mesogenic side-groups, it was even possible to photocrosslink these systems. It should be mentioned that in this first case the crosslinking caused some changes in film morphology, but the resulting films are very stable and do not even break when small holes are formed by mechanical stress (JS),... 

Zheng [ 136] predict a narrow low temperature range within which the vapour coexists with a ferroelectric liquid. It is worth stressing that at strong coupling, k>7, relaxation of the orientational structure is slow and the system may get trapped for long periods in metastable configurations [102,103,142],... 

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