A fluid liquid crystal with ferroelectric-like order
Hiroya Nishikawa(Kyushu University), Kazuya Shiroshita(Kyushu University), Hiroki Higuchi(Kyushu University), Yasushi Okumura(Kyushu University), Yasuhiro Haseba(JNC (Japan)), Shin-ichi Yamamoto(JNC (Japan)), Koki Sago(JNC (Japan)), Hirotsugu Kikuchi(Kyushu University)
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Abstract
A calamitic liquid crystal composed of 1,3-dioxane and fluorinated aryl units exhibits a highly polar and fluid mesophase (MP phase). In the MP phase, anomalously large dielectric permittivity (ca. 10<sup>4</sup>), ferroelectric-like polarization switching, and second harmonic generation (SHG) are observed. SHG interferometry also indicates the polarization inversion by reversing the applied electric field in the MP phase. These experimental data clearly show that in the MP phase, a unidirectional ferroelectric-like polar order exists along the director.
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