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The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals.Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities.While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
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This volume contains 19 review articles, written by leading experts in the field of neutron scattering, NMR, dielectric spectroscopy, ferroelectricity, liquid crystal polymers as well as related subjects. The articles cover a broad range of topics which are currently the center of focus and interest in this field. The book will be useful for experienced researchers as well as students and those who want to enter the field. Apart from the fact that such a publication covers a gap in the literature, there is also a personal actuality. This volume will be devoted to Professor L Bata, who started the liquid crystal research in Hungary some 25 years ago and who is still head of the department at KFKI today. He initiated a lot of new subjects in the field and supported many young scientists during these years. He is celebrating his 60th birthday this year.