Electrostrictive and Piezoelectric Effect in BaTiO<sub>3</sub> and PbZrO<sub>3</sub>

Wieczorek, Konrad; Ziebiniska, A.; Ujma, Z.; Szot, K.; Górny, M.; Franke, I.; Koperski, Janusz; Soszyński, Andrzej; Roleder, Krystian

doi:10.1080/00150190600695743

Cited by 57 publications

(34 citation statements)

References 6 publications

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“…Because of increasing correlation length and a long relaxation time of slow polar clusters near T c , a piezoelectric effect is expected in the paraelectric phase and was indeed shown to exist. 20 Since these large polar clusters may be treated as static objects to acoustic waves in the giga-Hertz range, it would be justifiable to rely on a Landau-Khalatnikov-like approach for analyzing the relaxation time of the relevant intracluster relaxation process coupled to the LA waves. 29,33 According to this approach, the relaxation time τ LA can be determined as follows: 33,34 …”

Section: Discussionmentioning

confidence: 99%

Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering

et al. 2011

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The acoustic anomalies and precursor dynamics of high-quality barium titanate single crystals were investigated by Brillouin light scattering and the birefringence measurements in the paraelectric phase above the cubic-totetragonal ferroelectric phase transition temperature (T c ). Two elastic stiffness coefficients C 11 and C 44 , the related sound velocities, and their absorption coefficients were determined from T c to 400 • C for the first time. The longitudinal acoustic (LA) mode showed a substantial softening over a wide temperature range above T c which was accompanied by a remarkable increase in the acoustic damping as well as growth of central peaks. The broad central peak (CP) exhibited a two-mode and one-mode behavior in the paraelectric and ferroelectric phase, respectively, which was consistent with recent far-infrared reflectivity measurements and first-principle-based calculations [Ponomareva et al., Phys. Rev. B 77, 012102 (2008)]. The acoustic anomalies and CP behavior were correlated with the anomalous birefringence, piezoelectric effect, and the deviation of the Curie-Weiss law observed from the same crystal. This strongly indicates similarity between the dynamics of polar clusters in typical ferroelectrics and the dynamics of polar nanoregions in relaxors, consistent with recent acoustic emission measurements [Dul'kin et al., Appl. Phys. Lett. 97, 032903 (2010)]. The relaxation times estimated from the central peak and the LA mode anomalies exhibited similar temperature dependences with comparable orders of magnitude, indicating that the polarization fluctuations due to the precursor polar clusters couples to the LA mode through density fluctuations. All these anomalies share common microscopic origin, correlated Ti off-centered motions forming polar clusters having local symmetry breaking in the paraelectric phase. The existence of the polar clusters were directly evidenced by the temperature evolution of the precise birefringence map. The narrow central peak within ±5 GHz proposed before was not confirmed to exist in the present study.

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Section: Discussionmentioning

confidence: 99%

Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering

et al. 2011

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“…The existence of polar clusters in the paraelectric phase influences also the electrostrictive properties of BaTiO 3 because of the nonzero value of squared polarization P 2 Fig. 9 Deviation degree ΔTcm from the Curie-Weiss law at the frequency of 100 kHz obtained for BT, BPT, BPTC(0.1 %) and BPTC(1 %) ceramics despite the fact that the remnant polarization is not measurable [37]. Brillouin light scattering studies [38,39] showed anomalous changes of acoustic phonons accompanied by the appearance of quasielastic central peak on approaching Tc in the paraelectric phase.…”

Section: Resultsmentioning

confidence: 99%

Effect of cobalt doping on the dielectric response of Ba0.95Pb0.05TiO3 ceramics

et al. 2013

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Dielectric response of Ba 0.95 Pb 0.05 TiO 3 ceramics doped with 0.1 and 1 wt.% of Co 2 O 3 , synthesized by conventional high-temperature method, was studied in wide temperature and frequency range. The temperature dependences of the real and the imaginary parts of dielectric permittivity of the ceramics were compared with those of BaTiO 3 and Ba 0.95 Pb 0.05 TiO 3. The addition of Co 3+ ions results in a broadening of dielectric anomalies related to the transition to paraelectric cubic phase, and the structural transition between the tetragonal and the orthorhombic phases. At low temperatures (125-200 K) the dielectric absorption of Co-doped Ba 0.95 Pb 0.05 TiO 3 ceramics was found to exhibit relaxor-like properties. The dielectric response has been found to contain the contributions characteristic of fluctuations of the polar nanoregion boundaries and reorientations of the dipole moments between allowed directions in the nanoregions in the rhombohedral and the orthorhombic phases. The behavior speaks in favor of ordering of polar defects in the host lattice of Ba 0.95 Pb 0.05 TiO 3 in a form polar nanoregions .

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“…Dielectric measurements were conducted under an external dc electric field of strength 0.02 kV/cm. The electromechanical strain x was determined in an ac electric field of strength E ac =3 kV/cm and frequency 165 Hz [6]. This low field intensity rendered the influence of terms with power of E ac higher than 2 negligible.…”

Section: Methodsmentioning

confidence: 99%

Non-Linear Properties of BaTiO₃above T_C

et al. 2008

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Although numerous papers on physical properties of the BaTiO 3 crystal can be found in literature, there is a lack of tentative studies of its properties in temperature range close to but above T C . That is why investigations of temperature dependence of the dielectric properties, electrostrictive strain and thermal expansion have been undertaken. Results obtained point to non-linear behaviour of all these properties even tens degrees above T C . Especially the non-linear thermal expansion, first time measured in detail for BaTiO 3 above T C , implies the existence of micro/nano-polar regions whose temperature stability and sizes are responsible for temperature hysteresis above T C .

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Electrostrictive and Piezoelectric Effect in BaTiO₃ and PbZrO₃

Cited by 57 publications

References 6 publications

Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering

Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering

Effect of cobalt doping on the dielectric response of Ba0.95Pb0.05TiO3 ceramics

Non-Linear Properties of BaTiO₃above T_C

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Electrostrictive and Piezoelectric Effect in BaTiO3 and PbZrO3

Cited by 57 publications

References 6 publications

Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering

Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering

Effect of cobalt doping on the dielectric response of Ba0.95Pb0.05TiO3 ceramics

Non-Linear Properties of BaTiO3above TC

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Electrostrictive and Piezoelectric Effect in BaTiO₃ and PbZrO₃

Non-Linear Properties of BaTiO₃above T_C