Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica and CNISM, Università Politecnica delle Marche, Ancona, Italy.
Phys Rev Lett. 2011 Nov 11;107(20):207801. doi: 10.1103/PhysRevLett.107.207801. Epub 2011 Nov 9.
A bent-core mesogen that forms a cybotactic nematic phase exhibits a giant magnetic field-induced shift of its nematic-isotropic and smectic-C-nematic transition temperatures: ΔT(H) = 4 K for H = 10 kOe. In contrast with molecular nematics, in cybotactic nematics the field couples with the anisotropic susceptibility of clusters containing several hundred partially ordered molecules. X-ray diffraction data corroborate a quantitative estimate of inferred cluster size (∼300 molecules). The results represent an unequivocal demonstration of the cluster picture of the nematic phase of this class of nonlinear liquid crystals.
一种形成向列织构各向同性相和近晶 C 相-向列相转变温度的巨磁致位移的弯曲中心介晶：磁场为 10kOe 时，温度位移为 4K。与分子向列相不同，在向列织构相中，磁场与包含数百个部分有序分子的各向异性的微区的介电常数耦合。X 射线衍射数据证实了推断的微区尺寸的定量估计（~300 个分子）。结果代表了对这类非线性液晶的向列相的微区图像的明确证明。
