Electric-field-induced<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mo>−</mml:mo><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>transition in bent-core mesogens

Ortega, J.; Fuente, M. R. de la; Etxebarría, J.; Folcia, C. L.; Díez, Sergio Cañas; Gallastegui, J. A.; Gimeno, Nélida; Ros, M. Blanca; Pérez‐Jubindo, M. A.

doi:10.1103/physreve.69.011703

Cited by 54 publications

(41 citation statements)

References 16 publications

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“…On applying an electric field, the domains break and the birefringence increases. The transition seems to be abrupt with a threshold field of the order of 10 V/μm as reported in [5]. • C without electric field.…”

Section: Field-induced B 1 -B 2 Phase Transitionsupporting

confidence: 54%

“…[17,18] and in Refs. [5,6,19], respectively. In both compounds a field-induced B 1 -B 2 phase transition was proposed on the basis of texture examination.…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, the switching performance often depends on the frequency and shape of the applied voltage. There are several examples of this behavior reported in the literature [5][6][7]. In the majority of them the phase transition is detected on the basis of texture observation.…”

Section: Introductionmentioning

confidence: 94%

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Electric-field-induced phase transitions in bent-core mesogens determined by x-ray diffraction

et al. 2011

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The changes in the x-ray diffraction diagram induced by an electric field have been studied in four bent-core liquid crystals. Two of the compounds present columnar B 1 phases and the other two show dark conglomerate (DC) structures. In the B 1 materials the electric field gives rise to switchable phases whose diffraction pattern is that of the smectic C polar (SmCP) phase. In the DC structures the positions of the Bragg reflections remain essentially unaltered, but in one of the compounds the peaks become narrower under field, indicating that the correlation length of the smectic order increases. A slight enhancement of the smectic spacing is found in the DC phases upon field application.

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Section: Field-induced B 1 -B 2 Phase Transitionsupporting

confidence: 54%

“…[17,18] and in Refs. [5,6,19], respectively. In both compounds a field-induced B 1 -B 2 phase transition was proposed on the basis of texture examination.…”

Section: Methodsmentioning

confidence: 99%

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Electric-field-induced phase transitions in bent-core mesogens determined by x-ray diffraction

et al. 2011

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“…Such structures were revealed by X-ray diffraction (Takanishi, 2003). Characteristic brushes forming Maltese crosses (Ortega et al, 2004) coincide with the polarizer-analyzer positions due to anticlinic order of molecules in two neighboring layers forming a pseudo-unit cell. The authors were able to grow B 2 phase after applying a strong electric field to B 1 phase.…”

Section: Electro-optic Methodsmentioning

confidence: 99%

Ferroelectric Liquid Crystals Composed of Banana-Shaped Thioesters

Wróbel¹,

Chruściel²,

Wierzejska-Adamowicz³

et al. 2011

Ferroelectrics - Physical Effects

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“…1b. Side chains of the molecule in one layer overlap the cores of molecules in neighboring layers [3].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Electrooptic Investigations of B Phases οf Banana-Shaped Thioesters

Wierzejska-Adamowicz

Ossowska-Chruściel²,

Chruściel³

et al. 2010

Acta Phys. Pol. A

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Electrooptic and dielectric measurements were done for B phases of two banana-shaped homologues 1,3-phenylene bis{4- [(4-nonyloxybenzoyl)sulfanyl]benzoate (9OSOR) and 1,3-phenylene bis{4-[(4-dodecyloxybenzoyl)sulfanyl]benzoate (12OSOR). Polarizing microscopy allowed to identify B 1 phase for 9OSOR and B 2 phase for 12OSOR on the basis of texture observation. Spontaneous polarization measurements were performed using reversal current method. The current response to applied triangular voltage shows that B 1 phase is a ferroelectric and B 2 phase -antiferroelectric one for which two well separated peaks were observed. Polarization for phase B 1 of 9OSOR is rather small and its temperature dependence is unusual for ferroelectric liquid crystals -it increases with temperature. Spontaneous polarization for B 2 phase of 12OSOR compound is of about 600 nC/cm 2 . Dielectric spectra measured with bias field for B 2 phase of 12OSOR show two well separated relaxation processes. In the low frequency range the relaxation process is connected with fluctuations of ferroelectric domains. The relaxation process in the high frequency range appearing also without bias field is connected with molecular reorientation. The dielectric spectra measured for B 1 phase of 9OSOR with and without bias voltage showed only one dielectric relaxation process connected with molecular reorientation around the short axis.

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Electric-field-inducedB1−B2transition in bent-core mesogens

Cited by 54 publications

References 16 publications

Electric-field-induced phase transitions in bent-core mesogens determined by x-ray diffraction

Electric-field-induced phase transitions in bent-core mesogens determined by x-ray diffraction

Ferroelectric Liquid Crystals Composed of Banana-Shaped Thioesters

Dielectric and Electrooptic Investigations of B Phases οf Banana-Shaped Thioesters

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