References
- Meyer , R. B. , Liebert , L. , Strzelecki , L. and Keller , P. 1975 . J. Phys. Lett., Paris , 36 : L69
- Bahr , Ch. , Heppke , G. and Sabaschus , B. 1991 . Liq. Crystals , 9 : 31
- Merz , W. J. 1953 . Phys. Rev. , 91 : 513
- Bahr , Ch. and Heppke , G. 1987 . Molec. Crystals liq. Crystals, (b) , 150 : 313
- Bahr , Ch. and Heppke , G. 1989 . Phys. Rev. A , 39 : 5459
- Bahr , Ch. and Heppke , G. 1990 . Phys. Rev. A , 41 : 4335
- SC-SA transitions are either first order or, in the vast majority of cases, second order. However, because the electric field induces a tilt in the SA phase, only the first order transition persists in the presence of an electric field; in the second order case, the situation in the presence of an electric field is comparable to that of a liquid-gas system in the supercritical region
- Garoff , S. and Meyer , R. B. 1977 . Phys. Rev. Lett. , 38 : 848
- Bahr , Ch. and Heppke , G. 1988 . Phys. Rev. A , 37 : 3179
- In principle, there should also be in this case a temperature shift. Because of the larger ε value the SB phase gains in the presence of an electric field a free energy decrease corresponding to ΔĘ2 compared to the SA phase (ΔεE2 being the ε difference between the two phases). However, we can estimate that this shift is negligible for experimentally reasonable field strengths
- Lines , M. E. and Glass , A. M. 1977 . Principles and Applications of Ferroelectrics and Related Materials , 353 Clarendon Press .
- Lines , M. E. and Glass , A. M. 1977 . Principles and Applications of Ferroelectrics and Related Materials , 169 Clarendon Press .
- Lötzsch , D. Similar ferroelectric liquid crystal compounds possessing the same chiral groups but three aromatic rings show Sj phases (which possess a structure very similar to SG phases) in which P s can be measured. The corresponding values are in the range of 300–600 nC/cm2 (private communication)