Weak ferromagnetic response in PbZr1−xTixO3 single crystals

Lazar, Iwona; Oboz, M.; Kubacki, Jerzy; Majchrowski, A.; Piecha, Julita; Kajewski, Dariusz; Roleder, Krystian

doi:10.1039/c9tc03710a

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…In contrast, when the poling is perpendicular to the O-Pb-O axis (Figure 11b), we obtain a spin-polarised defect state located at the two Ti atoms next to the two missing oxygen O rows. Such a weak magnetic response has already been observed in defected PZT single crystals [55]. The state is located at and in the conduction band minimum, making the system metallic (Figure 12).…”

Section: Dft Calculations and Source Of The Charge Carriers In Electr...supporting

confidence: 60%

The Electrodegradation Process in PZT Ceramics under Exposure to Cosmic Environmental Conditions

et al. 2023

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Long-time electric field action on perovskite piezoelectric ceramic leads to chemical degradation. A new way to accelerate the degradation is the exposure of the ceramic to DC electric fields under a vacuum. A high-quality commercial piezoelectric material based on PbZr1−xTixO3 is used to study such impacts. To avoid the influence of ferroelectric properties and possible removal of oxygen and lead oxides during the degradation process, the experiments are in the temperature interval of 500 °C > T > TC. Changes in resistance during the electrodegradation process is an electrically-induced deoxidation, transforming the ceramic into a metallic-like material. This occurs with an extremely low concentration of effused oxygen of 1016 oxygen atoms per 1 cm3. Due to this concentration not obeying the Mott criterion for an isolator-metal transition, it is stated that the removal of oxygen mostly occurs along the grain boundaries. It agrees with the first-principle calculations regarding dislocations with oxygen vacancies. The decrease in resistivity during electrodegradation follows a power law and is associated with a decrease in the dislocation dimension. The observed reoxidation process is a lifeline for the reconstructing (self-healing) properties of electro-degraded ceramics in harsh cosmic conditions. Based on all of these investigations, a macroscopic and nanoscopic model of the electrodegradation is presented.

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Section: Dft Calculations and Source Of The Charge Carriers In Electr...supporting

confidence: 60%

The Electrodegradation Process in PZT Ceramics under Exposure to Cosmic Environmental Conditions

et al. 2023

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“…The first phase diagram for PbZr x Ti 1-x O 3 (PZT) solid solutions, which was proposed by Sawaguchi in 1953 [ 1 ], was derived only from measurements on ceramics. However, even now, nearly seven decades since the system’s discovery, only a few papers have reported the properties of PZT single crystals [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ], mainly because of the difficulties in the technology involved in their growth [ 10 ]. Ceramics are much easier to make, so most papers on PZT have been on ceramics, especially at compositions around the MPB region, PbZr 0.52 Ti 0.48 O 3 [ 11 ], where there is a boundary between ferroelectric rhombohedral (F R ) and ferroelectric tetragonal (F T ) phases, and where the large piezoelectric effect was found.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Piezoelectric Strains in PbZr1−xTixO3 Single Crystals with Controlled Ti Content Close to the Tricritical Point

et al. 2022

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Intensive investigations of PbZr1-xTixO3 (PZT) materials with the ABO3 perovskite structure are connected with their extraordinary piezoelectric properties. Especially well known are PZT ceramics at the Morphotropic Phase Boundary (MPB), with x~0.48, whose applications are the most numerous among ferroelectrics. These piezoelectric properties are often obtained by doping with various ions at the B sites. Interestingly, we have found similar properties for undoped PZT single crystals with low Ti content, for which we have confirmed the existence of the tricritical point near x~0.06. For a PbZr0.95 ± 0.01Ti0.05∓ 0.01O3 crystal, we describe the ultrahigh strain, dielectric, optical and piezoelectric properties. We interpret the ultrahigh strain observed in the region of the antiferroelectric–ferroelectric transition as an inverse piezoelectric effect generated by the coexistence of domains of different symmetries. The complex domain coexistence was confirmed by determining optical indicatrix orientations in domains. The piezoelectric coefficient in this region reached an extremely high value of 5000 pm/V. We also verified that the properties of the PZT single crystals from the region near the tricritical point are incredibly susceptible to a slight deviation in the Ti content.

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“…After more than six decades, solid solutions of PbZr 1−x Ti x O 3 (PZT) still continue to be intensively studied piezoelectric materials and are among the most interesting compounds from the application perspective. Recently, ferromagnetic properties were also found in a PZT crystal [1], which means that these materials can be classified as multiferroics and may find even wider application. For a long time, the PZT phase diagram developed by Jaffe et al [2] has been accepted as the basic characterization of the PZT solid solution.…”

Section: Introductionmentioning

confidence: 99%

“…As early as 40 years ago, Whatmore et al [10] found that the diagram for ceramics differs from that for crystals. Only a few reports described the properties of PZT single crystals [1,[9][10][11][12][13][14][15][16], mainly due to above mentioned technological difficulties related to their growth. Our high quality single PbZr 0.87 Ti 0.13 O 3 crystal enabled investigations of phase transformations, domain structure, optical, dielectric, pyroelectric and elastic properties.…”

Section: Introductionmentioning

confidence: 99%

Phase Transitions and Local Polarity above TC in a PbZr0.87Ti0.13O3 Single Crystal

et al. 2020

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Solid solutions of PbZr1−xTixO3 (PZT) are one of the most widely used piezoelectric materials with perovskite structure. Despite the decades of research, the phase diagram of PZT reported in 1971 has not been resolved yet. Recently, it turned out that single crystals of good quality of these solid solutions can be grown. By means of top-seeded solution growth (TSSG) technique, we succeeded to grow a single PbZr0.87Ti0.13O3 crystal. Hence, a partial verification of the diagram could be performed through investigations of the optical, dielectric, pyroelectric and elastic properties of this crystal, in a wide temperature range. The obtained results confirmed that the PbZr0.87Ti0.13O3 crystal undergoes a sequence of phase transitions, such as those observed in ceramics of similar chemical composition. However, additional anomalies of investigated physical properties were observed and discussed. Moreover, the influence of electric field on optical properties has been investigated for the first time and has proven the existence of local polar character of the phase above TC in a limited temperature range.

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Weak ferromagnetic response in PbZr_1−xTi_xO₃ single crystals

Abstract: For the first time, a weak ferromagnetic hysteresis loop at room temperature has been observed in PbZr1−xTixO3 (PZT) single crystals.

Cited by 5 publications

References 33 publications

The Electrodegradation Process in PZT Ceramics under Exposure to Cosmic Environmental Conditions

The Electrodegradation Process in PZT Ceramics under Exposure to Cosmic Environmental Conditions

Ultrahigh Piezoelectric Strains in PbZr1−xTixO3 Single Crystals with Controlled Ti Content Close to the Tricritical Point

Phase Transitions and Local Polarity above TC in a PbZr0.87Ti0.13O3 Single Crystal

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