1993
DOI: 10.1103/physrevb.47.11019
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Dielectric properties ofRb2ZnCl4crystals in the commensurate ph

Abstract: Dielectric spectroscopy data in the frequency range 100 Hz -10 MHz are presented for two kinds of Rb&ZnC14 crystals, purified and standard quality, with special attention to the lock-in ferroelectric phase (C phase). It is shown that unlike standard-quality samples, the permittivity c tail extends deep into the C phase of purified crystals and is an almost unambiguous function of temperature. The c(T) dependence and its dispersion properties show that the temperature region below the incommensurate (IC) phase … Show more

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Cited by 25 publications
(8 citation statements)
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“…The influence of mobile domain walls on the dielectric response has been studied in a number of materials. [16][17][18] Generally speaking, the domain wall contribution to the dielectric permittivity D is connected with field induced shifts of the domain wall as a whole. The movement of domain walls is usually of relaxational type with a characteristic relaxation time D .…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The influence of mobile domain walls on the dielectric response has been studied in a number of materials. [16][17][18] Generally speaking, the domain wall contribution to the dielectric permittivity D is connected with field induced shifts of the domain wall as a whole. The movement of domain walls is usually of relaxational type with a characteristic relaxation time D .…”
Section: Resultsmentioning
confidence: 99%
“…For example, in Rb 2 ZnCl 4 the domain wall contribution to the dielectric permittivity was found around 0.8-3.6 MHz. 17 In KH 2 PO 4 crystals the domain wall dynamics occurs around 100 MHz just below T c ϭ122 K. 25 The relaxation time of the dispersion increases with decreasing temperature. At about 96 K the domain wall contribution vanishes completely due to a freezing of the domain wall motion, i.e., the relaxation time diverges.…”
Section: Discussionmentioning
confidence: 99%
“…13͒, which is similar to the result obtained from permittivity data of purified crystals. 3,19 One possible explanation for the increase of n(T) not discussed up to now may be a temperature-dependent wall thickness w(T). Theoretical considerations predict a relationship w( P 0 ) ͑Refs.…”
Section: B Temperature Dependence Of the Domain-wall Interaction Potmentioning
confidence: 95%
“…3 However, even in purified Rb 2 ZnCl 4 , swan neck shape hysteresis loops that allow the construction of a master curve can be observed only in a limited temperature range below the IC-C transition temperature. 18,20 This can be attributed to the temperature-dependent viscosity coefficient ␤ describing the friction force acting on a moving wall.…”
Section: B Temperature Dependence Of the Domain-wall Interaction Potmentioning
confidence: 99%
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