Depletion, Depolarizing Effects and Switching in Ferroelectric Thin Films

Tagantsev, A. K.; Landivar, M.; Colla, Enrico; Brooks, Keith G.; Setter, N.

doi:10.1007/978-94-017-2950-5_22

Cited by 9 publications

(10 citation statements)

References 14 publications

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“…E c will exhibit a different field dependence at low fields than a ferroelectric and will approach the ferroelectric value at higher fields. 21,22 The absolute value of P r will be reduced in the Fig. 10.…”

Section: (1) Case 1: Continuous Coveragementioning

confidence: 96%

“…Consider the Bearing in mind that PЈ r and PЈ m are different functions of the difference P m Ϫ P r . In general, the maximum polarization, P m , driving field (for a discussion, see Tagentsev and coworkers 21,22 ) can be expressed as a sum of the remnant (P r ), backswitching and are independent of X, one concludes that the difference (P b ), and lattice (P L ) polarizations, and one can write, for undoped material, P md Ϫ P rd ϭ (1 Ϫ X)(P m Ϫ P r ) ϩ X(PЈ m Ϫ PЈ r ) (4) P mu ϭ P ru ϩ P bu ϩ P Lu (9) cannot be independent of X. Also, in this case, the proportionality of P r and (dP/dE) E c and constancy of the average E c menBearing in mind that the remnant and backswitching contributions originate from the nonpinned part of the film, one can tioned above do not hold either, which can be easily verified.…”

Section: (1) Case 1: Continuous Coveragementioning

confidence: 99%

“…This observation does not fit the expected trend for Case 1, as the measured E c should be lower in the nonsaturated part of the curve. 21,22 The functional field dependence of average P r (Figs. 8 and 9) also was independent of niobium addition, contrary to the expected result if Case 1 holds.…”

Section: (1) Case 1: Continuous Coveragementioning

confidence: 99%

“…21,22 Even without knowing the exact values of the thickness of the pyrochlore and its dielectric constant, the field dependencies of the hysteresis parameters can be identified. E c will exhibit a different field dependence at low fields than a ferroelectric and will approach the ferroelectric value at higher fields.…”

Section: (1) Case 1: Continuous Coveragementioning

confidence: 99%

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Use of Ferroelectric Hysteresis Parameters for Evaluation of Niobium Effects in Lead Zirconate Titanate Thin Films

Klissurska

Tagantsev

Brooks

et al. 1997

Journal of the American Ceramic Society

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The effects of niobium doping on the hysteresis parameters fatigue properties. However, a one-to-one correlation, between the reported influence of niobium on the hysteresis-loop paramof sol-gel Pb 1.1؊ x 2 (Zr 0.53 Ti 0.47 ) 1؊x Nb x O 3 (0 , x , 0.05) have eters and the fatigue properties of thin films and bulk ceramics, been reported for two sets of films with analogous grain has not been clearly established. Ryder and Raman 9 and Amasize and degree of (111) texture but with different surface numa et al. 15 did not observe any improvement of the endurance microstructures. For both sets, a strong continuous decay of properties of PZT thin films with donor doping. Chen et al. 13 the remnant and maximum polarizations and slope of the reported a significantly less-pronounced effect of niobium on hysteresis loop at the coercive field was observed with increasthe endurance characteristics of thin films, as compared to bulk ing niobium concentration. The field dependence of the remceramics. However, fatigue improvement with niobium doping nant polarization for any given niobium-doped film was has been reported by Griswold et al. 7 and Chang and Desu. 16 identical to the functional field dependence of the undoped Few studies have intended to trace the softening effect of reference film, if multiplied by a niobium-concentrationniobium doping on the hysteresis parameters of thin films. The dependent constant. Although the maximum and remnant results, reported to date, are scattered as follows. Tuttle et al. 8 polarizations decayed as the dopant level increased, their reported no effect on coercive field and polarization values at difference remained the same value as that of the undoped niobium concentrations of 2.0 mol% and a degradation of the film at any given field. The width of the loop (at zero polarpolarization values and increase in coercive field for concentraization) was insensitive to the niobium concentration at any tions Ͼ5.0 mol%. Griswold et al. 7 presented a niobium-doped given field. A linear increase in coercive field asymmetry hysteresis loop with remnant polarization that was greater than (up to 40 kV/cm) was observed with niobium addition, yet that reported by Tuttle et al. 8 by a factor of ϳ4; however, the was field independent and, thus, electrostatic in origin. Nioexact niobium concentration and the precise Zr:Ti ratio were bium governed switching through a reduction of the numnot given for the studied sputtered films. From the fatigue profiles ber of switching domains, without changing the total lattice of undoped and niobium-doped films, provided by Griswold polarization response. Microstructure-related effects on et al., 7 the switchable polarization of the doped film is lower switching, such as decreased volume fraction of ferroelecthan that of the undoped one, at the beginning of the fatigue tric material or field-screening effects due to the presence of experiment. Ryder and Raman 9 reported systematically on the a pyrochlore second phase, were eliminated as the origin of dependencies of t...

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Section: (1) Case 1: Continuous Coveragementioning

confidence: 96%

Section: (1) Case 1: Continuous Coveragementioning

confidence: 99%

Section: (1) Case 1: Continuous Coveragementioning

confidence: 99%

Section: (1) Case 1: Continuous Coveragementioning

confidence: 99%

See 2 more Smart Citations

Use of Ferroelectric Hysteresis Parameters for Evaluation of Niobium Effects in Lead Zirconate Titanate Thin Films

Klissurska

Tagantsev

Brooks

et al. 1997

Journal of the American Ceramic Society

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“…The occurrence of surface pyrochlore is one factor that is known to cause such a shear phenomenon. 30 As a preface to describing the hysteresis saturation characteristics, a short discussion of the possible orientations of the spontaneous polarization vectors in the four films studied follows. First, it is noted that in the plane of the film, there is no preferred orientation.…”

Section: Switching Parametersmentioning

confidence: 99%

Influence of texture on the switching behavior of Pb(Zr_0.70Ti_0.30)O₃ sol-gel derived thin films

Brooks¹,

Klissurska²,

Moeckli³

et al. 1997

J. Mater. Res.

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Rhombohedral Pb(Zr 0.70 Ti 0.30 )O 3 thin films of four different well-defined textures, namely, (100), (111), bimodal (110)͞(111), and (100)͞(111), were prepared by a sol-gel method. The films were characterized in terms of grain size, presence of second phases, surface roughness, columnarity of grains, and other microstructural features. The dielectric, ferroelectric, and fatigue properties were investigated, with emphasis on the hysteresis switching characteristics. Results are discussed from the reference point of the allowable spontaneous polarization directions available for the different textures. The values of coercive field, remanent and saturation polarization, and slope of the loop at the coercive field, at saturating fields can be qualitatively explained based on the texture, independent of microstructural differences. The occurrence of surface pyrochlore, however, is observed to affect the functionality of the saturation curves, particularly for the samples of bimodal texture. Shearing of the hysteresis curves of the bimodal films is also attributed to surface microstructural features. The occurrence of nonswitching 71± or 109 ± domains in the (111) and (110)

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Pulsed laser deposition of crystalline PZT thin films

Husmann

Wesner

Schmidt

et al. 1997

Surface and Coatings Technology

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Depletion, Depolarizing Effects and Switching in Ferroelectric Thin Films

Cited by 9 publications

References 14 publications

Use of Ferroelectric Hysteresis Parameters for Evaluation of Niobium Effects in Lead Zirconate Titanate Thin Films

Use of Ferroelectric Hysteresis Parameters for Evaluation of Niobium Effects in Lead Zirconate Titanate Thin Films

Influence of texture on the switching behavior of Pb(Zr_0.70Ti_0.30)O₃ sol-gel derived thin films

Pulsed laser deposition of crystalline PZT thin films

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Depletion, Depolarizing Effects and Switching in Ferroelectric Thin Films

Cited by 9 publications

References 14 publications

Use of Ferroelectric Hysteresis Parameters for Evaluation of Niobium Effects in Lead Zirconate Titanate Thin Films

Use of Ferroelectric Hysteresis Parameters for Evaluation of Niobium Effects in Lead Zirconate Titanate Thin Films

Influence of texture on the switching behavior of Pb(Zr0.70Ti0.30)O3 sol-gel derived thin films

Pulsed laser deposition of crystalline PZT thin films

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Product

Resources

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Influence of texture on the switching behavior of Pb(Zr_0.70Ti_0.30)O₃ sol-gel derived thin films