Magnetic resonance, soft and central modes in hydrogen bonded ferroelectrics and ferroelectric liquid crystals: A review
- 1 January 1977
- journal article
- review article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 16 (1), 33-48
- https://doi.org/10.1080/00150197708237116
Abstract
A review is given of the recent progress in the use of nqr, nmr and epr for the study of soft modes in order-disorder and displacivc type solid ferroelectrics. The study of the soft modes and symmetry recovering Goldstone modes in liquid crystalline ferroelectrics where-in contrast to solid ferroelectrics-a discrete symmetry group is broken at the phase transition temperature is as well reviewed. The evidence for central modes obtained from the dispersion of T 1 between O and 60 K Gauss in KD2FO4 NaH3(SeO3)2 and several liquid crystalline systems is discussed.Keywords
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