Domain wall freezing in KDP-type ferroelectrics

Schmidt, V. Hugo; Bohannan, Gary W.; Arbogast, D. J.; Tuthill, G. F.

doi:10.1016/s0022-3697(99)00294-2

Cited by 30 publications

(9 citation statements)

References 8 publications

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“…2 This anomaly was interpreted 3 in terms of dielectric contributions of dielectric domain walls, an activity which freezes out below T f . 4,5 There have been repeated reports about Debye-like dispersion in the ferroelectric phase of KH 2 PO 4 below the frequency f res of the fundamental piezoelectric resonance. [6][7][8][9][10] It is now well established that this low-frequency relaxation, representing a composite dispersion which includes at least three relaxational modes, is related to domain-wall motion.…”

Section: Introductionmentioning

confidence: 95%

Dielectric dispersion due to weak domain wall pinning inRbH2PO4

et al. 2002

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Dielectric spectroscopy experiments are carried out in the ferroelectric phase of rubidium dihydrogen phosphate (RbH 2 PO 4 ), within the frequency range 0.1 HzϽ f Ͻ1 MHz. A strong dielectric time decay ͑ageing͒ dominates after thermal equilibration. However, spectra taken after long dwelling times reveal a significant dispersion below the fundamental piezoelectric resonance frequency f res . The permittivity of the well-aged sample is found to decrease linearly with the logarithm of the frequency. Not detectable above the paraelectricferroelectric phase transition temperature T c , the dispersion is observed both in the range T c ϾTϾT f Ϸ117 K of the anomalously high domain wall contribution and in the low-temperature range TϽT f corresponding to the frozen-in domain-wall response. The result indicates that the concept of weak pinning in the context of the theory of elastic interfaces in disordered media may be applicable to describe the interaction between the ferroelectric/ferroelastic domain walls in RbH 2 PO 4 and randomly distributed impurities.

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Section: Introductionmentioning

confidence: 95%

Dielectric dispersion due to weak domain wall pinning inRbH2PO4

et al. 2002

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“…RDP may show about as large an effect, although it has not been followed for quite as long. [8] Although there have been several ideas for why the domain-wall response is lost at the low-T end of the plateau region [3,4,13,21,22], none would imply that a similar loss of response would occur over time at a much higher temperature.…”

Section: Discussionmentioning

confidence: 99%

“…Finally we shall discuss possible implications of the aging effects for the principle question remaining for KDP and related ferroelectrics-the origin of the rather abrupt freezing transition by which domain walls lose their mobility at low temperature. [3,4,13,21] Model Background Since a key point of this paper will be that the linearized diffusion model does not suffice to describe the full aging process, before presenting results we shall describe the kinetics For response driven by simple field-tilting of a quadratic domain wall free-energy minimum, the linear susceptibility would fall off inversely with the curvature of the pinning potential, just like the response of a spring to a force. The H-binding contribution to the curvature would increase as…”

Section: /21/19mentioning

confidence: 99%

“…Finally we shall discuss possible implications of the aging effects for the principle question remaining for KDP and related ferroelectrics-the origin of the rather abrupt freezing transition by which domain walls lose their mobility at low temperature. [3,4,13,21] Model Background Since a key point of this paper will be that the linearized diffusion model does not suffice to describe the full aging process, before presenting results we shall describe the kinetics expected for such a model. A straightforward calculation of the kinetics of such a model can be done in spatial Fourier space, since each spatial Fourier component of the H concentration decays exponentially in time toward its Boltzmann equilibrium value, with 4/21/19 time constant inversely proportional to the square of the wavevector.…”

Section: Introductionmentioning

confidence: 99%

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Multiple aging mechanisms in ferroelectric deuterated potassium dihydrogen phosphate

Fields

Cieszynski

Zhao

et al. 2019

Journal of Applied Physics

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The anomalously large dielectric aging in ferroelectric partially deuterated potassium dihydrogen phosphate (DKDP) is found to have multiple distinct mechanisms. Two components cause decreases in dielectric response over a limited range of fields around the aging field. Substantial aging occurs on time scales of ~1000s after a field change, as expected for a hydrogen/deuterium diffusion mechanism. A slower component can give almost complete loss of domain-wall dielectric response at the aging field after weeks of aging. There is also a particularly unusual aging in which the dielectric response increases with time after rapid cooling.

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“…For linear systems, fractional differentiation/integration operators with non-integer exponents can spontaneously overcome the irreversibility problem, and hence they can be employed to describe a wide range of kinetic/transfer phenomena. Therefore, we observe a growing interest in applying fractional calculus in diverse scientific fields of natural and applied sciences [1,2,3,4,5,6,7,8]. Historically, Khalil, Al Horani, Yousef, and Sababheh were the first who introduce conformable fractional derivatives (CFD) [9].…”

Section: Introductionmentioning

confidence: 99%