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Bedoya, C.; Müller, Christophe; Kowalski, Adam; Nigrelli, E.; Roubin, M.; Leblais, J.-Y. M.

doi:10.1023/a:1012409711631

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…[2,7]). It was already shown that while strontium only shifts the morphotropic phase boundary to the Zr-rich region [8,9], the niobium influences the size of the ceramic grains [10,11]. The density of the investigated sample was estimated to be 95% of the theoretical one.…”

Section: Introductionmentioning

confidence: 96%

Anomalous piezoelectric and elastic properties of a tetragonal PZT ceramic near morphotropic phase boundary

Franke¹,

Roleder²,

Klimontko³

et al. 2005

J. Phys. D: Appl. Phys.

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A ceramic of nominal formula Pb0.95Sr0.05(Zr0.53Ti0.47)0.98Nb0.02O3 has been investigated. Dielectric properties and differential scanning calorimetry tests pointed to a transformation temperature of 306 °C. By means of a dynamic method the piezoelectric and complex elastic compliances for polarized ceramics have been measured as a function of temperature. The temperature dependence of the elastic properties has indicated bilinear coupling between the order parameter and strain. The unexpected existence of a pertinent piezoelectric response far above accompanied by strong changes in the elastic properties was observed. On the basis of the dielectric response and x-ray diffraction studies carried out on poled and unpoled ceramics, the influence of the compositional fluctuations and the existence of polar regions on the anomalous piezoelectric activity above were considered rather than a change of symmetry after the action of an external electric field.

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Section: Introductionmentioning

confidence: 96%

Anomalous piezoelectric and elastic properties of a tetragonal PZT ceramic near morphotropic phase boundary

Franke¹,

Roleder²,

Klimontko³

et al. 2005

J. Phys. D: Appl. Phys.

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“…Lead titanate zirconate PbZr 1−x Ti x O 3 solid solution (noted PZT), which crystallizes in various distorted perovskite-type structures, are well known for their dielectric and ferroelectric properties [1][2][3][4]. As in the PZT family, the binary phase diagram of the isomorphic PbHfO 3 -PbTiO 3 solid solution (so-called PHT) can be roughly described at room temperature in three composition areas [1,5,6]: the rhombohedral Hf-rich region is separated from the tetragonal Ti-rich one by a morphotropic region in which the two phases coexist [7]. Above the transition temperature T 0 , which increases with Ti content, all the compounds crystallize in a paraelectric cubic phase (space group P m 3m).…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric-paraelectric phase transition in PbHf_0.2Ti_0.8O₃studied by neutron powder diffraction

Bedoya

Müller

Baudour

et al. 2001

J. Phys.: Condens. Matter

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Neutron powder diffraction data, collected over the temperature range 10-810 K, have been analysed in order to study the ferroelectric-paraelectric transition in the ferroelectric compound PbHf0.2Ti0.8O3. This transition appears at 670 K between the low-temperature tetragonal phase and the high-temperature cubic phase. From high-resolution neutron powder diffraction data (3T2-LLB), the tetragonal structure of the ferroelectric phase has been refined at 10, 300 and 400 K using a Rietveld-type method: space group P4mm, Z = 1; at T = 10 K, at = 3.9299(4) Å, ct = 4.1239(5) Å and Vt = 63.689 Å3; at T = 300 K, at = 3.9405(4) Å, ct = 4.1038(5) Å and Vt = 63.723 Å3; and at T = 400 K, at = 3.9468(4) Å, ct = 4.0901(5) Å and Vt = 63.713 Å3. In addition, a neutron powder thermodiffractometry experiment (D1B-ILL) has been performed to study in situ the temperature induced phase transition. From sequential Rietveld refinements, the thermal dependence of the cationic displacements has been analysed and a spontaneous polarization has been derived. From a generalized effective field theory, the first-order character of the phase transition has been established. Finally, the structural results obtained on the ferroelectric PbHf0.2Ti0.8O3 are discussed in reference to PbTiO3 and PbHf0.4TiO0.6O3 compounds.

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“…Past studies on PbHf 1– x Ti x O 3 ceramics found PbHf 0.5 Ti 0.5 O 3 as the composition corresponding to the MPB. ,,,,, The presence of complex domain structures, however, can greatly influence the dielectric behavior of the mixed-phase, thin-film compositions ( x = 0.4–0.55). Thus, two measurements were performed, as noted in the Experimental Section, to help better identify the location of the MPB in the films: frequency-dependent ε r measurements with increasing DC-background bias ,− and Rayleigh studies as a function of increasing AC field. , Such studies allow for the quantification of the intrinsic/extrinsic and reversible/irreversible contributions to the dielectric response.…”

Section: Resultsmentioning

confidence: 99%

“…In the current work, we build from these lessons and explore the MPB in the PbHf 1– x Ti x O 3 (0 < x < 1) system which is analogous to PbZr 1– x Ti x O 3 . , Previous studies on PbHf 1– x Ti x O 3 bulk ceramics and polycrystalline films report the presence of an MPB near PbHf 0.5 Ti 0.5 O 3 . ,− Additionally, a few reports have suggested an improvement in fatigue and imprint behavior in certain compositions of polycrystalline PbHf 1– x Ti x O 3 thin films as compared to that in PbZr 1– x Ti x O 3 . , This, combined with the higher compatibility of the growth process, further motivates the need to more extensively study PbHf 1– x Ti x O 3 as epitaxial thin films and probe the composition-driven evolution in the crystal structure and dielectric, piezoelectric, and ferroelectric properties. In this spirit, here, highly crystalline, fully relaxed, and epitaxial PbHf 1– x Ti x O 3 ( x = 0, 0.25, 0.4, 0.45, 0.5, 0.55, 0.75, and 1) thin films are synthesized on SrRuO 3 /SrTiO 3 (001) substrates.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Morphotropic Phase Boundary in Epitaxial PbHf_1–xTi_xO₃ Thin Films

et al. 2022

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Epitaxial PbHf1–x Ti x O3/SrTiO3(001) thin-film heterostructures are studied for a potential morphotropic phase boundary (MPB) akin to that in the PbZr1–x Ti x O3 system. End members, PbHfO3 and PbTiO3, were found to possess orthorhombic (Pbam) and tetragonal (P4mm) crystal structures and antiferroelectric and ferroelectric (∼87 μC/cm2) behavior, respectively. PbHf0.75Ti0.25O3 and PbHf0.25Ti0.75O3 solid solutions were both found to be ferroelectric with rhombohedral (R3c, ∼22 μC/cm2) and tetragonal (P4mm, ∼46 μC/cm2) structures, respectively. For intermediate PbHf1–x Ti x O3 compositions (e.g., x = 0.4, 0.45, 0.5, and 0.55), a structural transition was observed from rhombohedral (hafnium-rich) to tetragonal (titanium-rich) phases. These intermediate compositions also exhibited mixed-phase structures including R3c, monoclinic (Cm), and P4mm symmetries and, in all cases, were ferroelectric with remanent (5–22 μC/cm2) and saturation (18.5–36 μC/cm2) polarization and coercive field (24–34.5 kV/cm) values increasing with x. While the dielectric constant was the largest for PbHf0.6Ti0.4O3, the MPB is thought to be near x = 0.5 after separation of the intrinsic and extrinsic contributions to the dielectric response. Furthermore, piezoelectric displacement–voltage hysteresis loops were obtained for all chemistries revealing displacement values as good as PbZr0.52Ti0.48O3 films in the same geometry. Thereby, the PbHf1–x Ti x O3 system is a viable alternative to the PbZr1–x Ti x O3 system offering comparable performance.

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Untitled

Cited by 15 publications

References 13 publications

Anomalous piezoelectric and elastic properties of a tetragonal PZT ceramic near morphotropic phase boundary

Anomalous piezoelectric and elastic properties of a tetragonal PZT ceramic near morphotropic phase boundary

Ferroelectric-paraelectric phase transition in PbHf_0.2Ti_0.8O₃studied by neutron powder diffraction

Exploring the Morphotropic Phase Boundary in Epitaxial PbHf_1–xTi_xO₃ Thin Films

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Untitled

Cited by 15 publications

References 13 publications

Anomalous piezoelectric and elastic properties of a tetragonal PZT ceramic near morphotropic phase boundary

Anomalous piezoelectric and elastic properties of a tetragonal PZT ceramic near morphotropic phase boundary

Ferroelectric-paraelectric phase transition in PbHf0.2Ti0.8O3studied by neutron powder diffraction

Exploring the Morphotropic Phase Boundary in Epitaxial PbHf1–xTixO3 Thin Films

Contact Info

Product

Resources

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Ferroelectric-paraelectric phase transition in PbHf_0.2Ti_0.8O₃studied by neutron powder diffraction

Exploring the Morphotropic Phase Boundary in Epitaxial PbHf_1–xTi_xO₃ Thin Films