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Show moreThe electroclinic effect and dielectric response have been investigated in the British Drug House material SCE12 over its entire 15-K smectic-A range. Near the smectic-Asmectic-C*-phase transition both the electroclinic coefficient and dynamic response behave normally, the former diverging and the latter exhibiting a critical slowing down on approaching TA-C* from above. Similar behavior is seen in the dielectric response. Approximately 10 to 12 K above TA-C*, however, it was found that the electroclinic relaxation time levels off and even begins to increase again on approaching the nematicsmectic-A transition from below. The magnitude of the electroclinic coefficient, however, decreases monotonically on approaching the nematicsmectic-A transition. © 1991 The American Physical Society. Appropriate bibliographic citation and notice of the APS copyright must be included- "Li Z., Akins R.B., Dilisi G.A., Rosenblatt C., Petschek R.G., Physical Review A 43:2, 852-857 (1991). Copyright 1991 by the American Physical Society".
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Show moreThe effective response time eff of the nematic-electroclinic effect was determined as a function of driving frequency and temperature. Near the nematicsmectic-A transition temperature TNSm-A, eff was found to be a function of driving frequency, indicating the existence of more than one physical process. Several degrees above TNSm-A, eff was found to be frequency independent up to 100 kHz. At these temperatures, moreover, the effective response times are quite small, of order 100 ns. © 1991 The American Physical Society. Appropriate bibliographic citation and notice of the APS copyright must be included- "Li Z., Ambigapathy R., Petschek R.G., Rosenblatt C., Physical Review A 43:12, 7109-7112 (1991). Copyright 1991 by the American Physical Society."
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