Use of dielectric spectroscopy for evidencing subphases in an antiferroelectric liquid crystal

被引：5

作者：

Marino, Lucia ^{[1
,2
]}

Ionescu, Andrei Th. ^{[3
]}

Pucci, Daniela ^{[4
]}

Marino, Salvatore ^{[5
]}

Bruno, Emanuela ^{[6
]}

Scaramuzza, Nicola ^{[1
,2
,6
]}

机构：

[1] CNR IPCF, UOS Cosenza, I-87036 Arcavacata Di Rende, CS, Italy

[2] CNR IPCF, Excellence Ctr CEMIF CAL, I-87036 Arcavacata Di Rende, CS, Italy

[3] Univ Bucharest, Fac Phys, RO-077125 Bucharest, Romania

[4] Univ Calabria, Dept Chem, I-87036 Arcavacata Di Rende, CS, Italy

[5] Univ Malaga, Dept Fis Aplicada 1, Nanotech Unit, E-29071 Malaga, Spain

[6] Univ Calabria, Dept Phys, I-87036 Arcavacata Di Rende, CS, Italy

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 116卷 / 11期

关键词：

SMECTIC-A PHASE; C-STAR; POLARIZATION; TRANSITION;

D O I：

10.1063/1.4892019

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The analysis of an orthoconic antiferroelectric liquid-crystalline mixture, using dielectric spectroscopy, has revealed a plurality of ferroelectric smectic C* subphases. A great variety of relaxation responses that could indicate the presence of different SmC* subphases has been observed with the differential scanning calorimetry (DSC) technique in partial agreement with other techniques as DSC and optical microscopy. They represent smectic intermediate variants between the ferroelectric phase and the antiferroelectric one, whose study is still open and is collecting a lot of interest in academic field. The results obtained by dielectric spectroscopy were compared with other techniques as differential scanning calorimetry and polarized optical microscopy. The results demonstrate the possibility of using dielectric spectroscopy to highlight subphases that cannot be observed with conventional experimental techniques. (C) 2014 AIP Publishing LLC.

引用

页数：6

共 50 条

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