Visualization of domain structure of a weak ferroelectric Li₂Ge₇O₁₅by nematic liquid crystal method

Coupling of the remanent polarisation in thin film oxide ferroelectrics with nematic liquid crystals

“…It has been known since 1973 that a thin film of nematic liquid crystal (NLC ), when placed upon a ferroelectric crystal, is able to delineate the domain structure of the underlying crystal substrate. [1][2][3][4][5][6][7][8][9][10] This phenomenon was first demonstrated by Furuhata and Toriyama for the ferroelectric crystal triglycine sulfate (TGS ) and the NLC p-N-( p-methoxybenzylidene)amino-n-butylbenzene.1 They proposed a model whereby the spontaneous polarisation of a ferroelectric domain couples Bi 2 Br 11 .7 More the direct surface interactions. Further, the well defined device recently the coupling mechanism between the domains of geometry allows the interaction of the NLC layer with the ferroelectric crystals with NLC has been described in terms of OFE to be quantified, as will be discussed.…”