Author/Authors :
Miku?ko، نويسنده , , A. and Marzec، نويسنده , , M. and Wrobel، نويسنده , , S. and Przedmojski، نويسنده , , J. and Douali، نويسنده , , R. and Legrand، نويسنده , , Ch. and D?browski، نويسنده , , R. and Haase، نويسنده , , W.، نويسنده ,
Abstract :
Two chiral liquid crystalline compounds have been investigated, namely 4-(1-methylheptyloxycarbonyl) phenyl-4′nonylbiphenyl-4-carboxylate (MHPNBC), 3-(2-fluor-octyloxy)-6-(4octyl-phenyl) pyridine (FOOPP) to study the SmA∗–SmC∗ transition. For both substances strong electroclinic effect is observed in the SmA∗ phase what indicates that it is the so-called de Vries SmA∗ phase. To study the paralectric-ferroelectric de Vries type transition electrooptic, dielectric as well as SAXS methods have been applied.
