Ferrielectric six-layer () and several electric-field-induced subphases in AS657 studied by complementary methods, electric-field-induced birefringence and microbeam resonant X-ray scattering
| Autor: | Jagdish K. Vij, Atsuo Fukuda, A. D. L. Chandani Perera, Yoichi Takanishi |
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| Rok vydání: | 2017 |
| Předmět: |
Birefringence
Materials science Condensed matter physics Scattering media_common.quotation_subject Frustration General Chemistry Microbeam Atmospheric temperature range Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Nuclear magnetic resonance Liquid crystal Electric field 0103 physical sciences Antiferroelectricity General Materials Science 010306 general physics media_common |
| Zdroj: | Liquid Crystals. :1-19 |
| ISSN: | 1366-5855 0267-8292 |
| DOI: | 10.1080/02678292.2017.1385104 |
| Popis: | A selenium-containing compound, AS657, is studied with two complementary methods, electric-field-induced birefringence (EFIB) and microbeam resonant X-ray scattering (µRXS). AS657 shows a phase sequence of Sm – – – Sm – Sm where no Sm emerges and hence the frustration between Sm and Sm plays an important role. In spite of this situation, two additional temperature-induced subphases are observed: (1) antiferroelectric eight-layer between Sm and and (2) antiferroelectric 10-layer between and . A number of field-induced subphases are also shown to emerge. The most notable new finding is the observation of an electric-field-induced ferrielectric subphase of six-layer () between and Sm; this subphase is stabilised even at zero field in a mixture of 92.6 wt% AS657 and 7.4 wt% AS620. Another field-induced subphase of six-layer is also confirmed to emerge in the temperature ranges of SmCA* and . The nature of the field-induced transitions in the temperature range is more complex than previously thought; i... |
| Databáze: | OpenAIRE |
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