Electromechanical Response and Dielectric Loss of Prepolarized Barium Titanate under Maintained Electric Bias. Part I

Baerwald, H. G.; Berlincourt, Don

doi:10.1121/1.1907164

Cited by 28 publications

(6 citation statements)

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“…The ferroelectric system is prevented from reaching the equilibrium state corresponding to the amplitude employed (placed in the upper positive-susceptibility region of the DHL) by the decreasing and inversion of the applied sine wave occurring too early. Hysteresis loops like those depicted in figure 4 have already been reported in a paper describing the ferroelectric behaviour of some barium titanate poled ceramics [28].…”

Section: Analysis Of Homogeneous Switching and Discussionsupporting

confidence: 69%

Analysis of ferroelectric switching in finite media as a Landau-type phase transition

Ricinschi

Harnagea

Papusoi

et al. 1998

J. Phys.: Condens. Matter

121

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A detailed analysis of polarization reversal in ferroelectrics has been performed, in the framework of the Landau model for phase transitions. Some important characteristics of homogeneous switching have been emphasized and later used in studying the more general case of inhomogeneous switching. The two extremes of switching current correspond to the inflexion points of the dielectric hysteresis loop. Hysteresis loops of poled ferroelectric samples are expected to include negative-susceptibility regions, for high-frequency applied electric fields. The switching current minimum is eliminated by the experimental method used for recording the switching responses. Equivalent Landau coefficients and electric fields have been defined, in order to integrate the size effects and inhomogeneity contribution to switching of the global order parameter. We correlated the size effects on the critical parameters of the switching (the coercive field) and the ferroelectric-to-paraelectric phase transition (the Curie temperature). Polarization reversal in small-size ferroelectrics can be regarded as a diffuse phase transition, whereas its character is closer to normal for large-size samples. The size dependencies of the reversal speed and maximum current result from the size dependencies of the equivalent Landau coefficients and electric field inducing reversal.

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Section: Analysis Of Homogeneous Switching and Discussionsupporting

confidence: 69%

Analysis of ferroelectric switching in finite media as a Landau-type phase transition

Ricinschi

Harnagea

Papusoi

et al. 1998

J. Phys.: Condens. Matter

121

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“…Loops with negative susceptibility like those depicted in Fig. 4͑b͒ have already been reported in a paper describing the ferroelectric behavior of some barium titanate poled ceramics, 43 and Ricinschi et al have discussed the physical meaning of the negative-susceptibility regions in hysteresis loops. 44 Figure 4 is obtained when we apply a sinusoidal wave without any initial phase.…”

Section: B Effect Of Domain Pinningmentioning

confidence: 58%

Mechanisms of imprint effect on ferroelectric thin films

Zhou

Chan

Lam

et al. 2005

Journal of Applied Physics

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We have developed a single/double layer model to explain horizontal shifting of measured D-E hysteresis loops ͑imprint͒ for ferroelectric thin films. Such phenomenon can be explained by considering three mechanisms or their multiple effects: ͑1͒ stress induced by film/electrode lattice mismatch or clamping, ͑2͒ domain pinning induced by, e.g., oxygen vacancies, or ͑3͒ degradation of ferroelectric properties in film/electrode surface layers. First, it is found that hysteresis loops under the influence of stress exhibit large horizontal shifts with magnitudes comparable to those observed in experiments. Second, a pseudo-non-switching layer with a large coercive field is assumed to be present at the film/electrode interface in an otherwise homogeneous ferroelectric thin film, and in this case our simulation also shows a large imprint effect. Third, it is also found that time-dependent space-charge-limited conduction is likely to be one origin for the occurrence of imprint.

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“…This result, however, is not consistent with the theoretical prediction based on the Devonshire free energy expression or experimental results determined from macroscopic strain measurements, which showed the shift in the critical transition electric field with temperature of 0.12 kV mm À1 C À1 and 0.118 kV mm À1 C À1 , respectively. 5,20 It is possible that the origin of the discrepancy between these results is related to the electrical loading procedure, however, without concurrent strain and diffraction measurements it is difficult to discern. As shown in Fig.…”

Section: -mentioning

confidence: 99%

Electric-field-induced paraelectric to ferroelectric phase transformation in prototypical polycrystalline BaTiO3

Wang

Webber

Hudspeth

et al. 2014

Applied Physics Letters

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An electric-field-induced paraelectric cubic to ferroelectric tetragonal phase transformation has been directly observed in prototypical polycrystalline BaTiO3 at temperatures above the Curie point (TC) using in situ high-energy synchrotron X-ray diffraction. The transformation persisted to a maximum temperature of 4 °C above TC. The nature of the observed field-induced transformation and the resulting development of domain texture within the induced phase were dependent on the proximity to the transition temperature, corresponding well to previous macroscopic measurements. The transition electric field increased with increasing temperature above TC, while the magnitude of the resultant tetragonal domain texture at the maximum electric field (4 kV mm−1) decreased at higher temperatures. These results provide insights into the phase transformation behavior of a prototypical ferroelectric and have important implications for the development of future large-strain phase-change actuator materials.

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Electromechanical Response and Dielectric Loss of Prepolarized Barium Titanate under Maintained Electric Bias. Part I

Cited by 28 publications

References 0 publications

Analysis of ferroelectric switching in finite media as a Landau-type phase transition

Analysis of ferroelectric switching in finite media as a Landau-type phase transition

Mechanisms of imprint effect on ferroelectric thin films

Electric-field-induced paraelectric to ferroelectric phase transformation in prototypical polycrystalline BaTiO3

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