Dielectric and magnetic anisotropy of a nematic ytterbium complex

Abstract

The sign and the magnitude of the dielectric anisotropy of an ytterbium based paramagnetic nem atic liquid crystal complex, namely, tris[1 (4 (4 propylcyclohexyl)phenyl)octane 1,3 dione] [5,5' di(hep tadecile) 2,2' bipyridine]ytterbium, are determined. The temperature dependence of the permittivity com ponents of the complex is obtained in the temperature range of a nematic phase. The sign of the anisotropy of the magnetic susceptibility of this compound is experimentally determined.

Optical, Electrooptical and Dielectric Properties of Liquid Crystalline Tris(β-Diketonates) Ytterbium Adduct

“…В этом случае ε || =2ε 2 -ε 1 , так как при Δχ m < 0 магнитное поле не создает преимущественной ориентации длинных осей молекул относительно электрического поля [21]. Зависимости компонент диэлектрических про-ницаемостей ε  , ε 2 и ε || от частоты электрического поля приведены на рис.…”

The anisotropic properties of a terbium-based liquid crystal complex

“…The object of the study was a liquid crystal complex tris [1-(4-(4-propylcyclohexyl) [15,16]. The synthetic schemes for the investigated materials are shown in Fig.…”

“…The difference of 10 degrees between the directions of the axes of the highest value of the magnetic susceptibility χ and the highest value of the dielectric permittivity ε, has been found in the study of the dielectric properties of Yb(CPDk 3−5 ) 3 Bpy 17−17 using the orienting magnetic field [16]. Therefore, in this study we measured the dielectric permittivity Tb(CPDk 3−5 ) 3 Bpy 17−17 at different angles ϕ between the directions of the probing electric field E (f = 10 kHz) and the orienting magnetic field (H=5000 Oe).…”

“…It was found that magnetic properties of lanthanidomesogens are strongly dependent upon the nature of the lanthanide ion and on the structure of the coordination center [13,14]. The first study of the dielectric properties of lanthanidomesogens -tris [1-(4-(4-propylcyclohexyl) [15,16]. The frequency dependence of the components of the dielectric permittivity tensor has been obtained in the range between 100 Hz-5 MHz.…”