Revisiting the temperature‐dependent dielectric permittivity of Ba(Ti1−xZrx)O3

Liu, Laijun; Ren, Shaokai; Zhang, Jie; Peng, Biaolin; Fang, Liang; Wang, Dawei

doi:10.1111/jace.15410

Cited by 55 publications

(7 citation statements)

References 38 publications

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“…The higher-in-temperature DPT around 900 K is associated with the ferroelectric to paraelectric phase transition rather than the effect of space charges. [17] In order to gain further insights into the re-entrant relaxors, we employ the macroscopic and phenomenological approach [18,19] to describe and fit the ε 0 of 0.6Bi (1-x) (Mg 1/2 Ti 1/2 ) O 3 -0.4PbTiO 3 . In this approach, the dielectric permittivity is proposed to following expressions [12,14]…”

Section: Resultsmentioning

confidence: 99%

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg_1/2Ti_1/2)O₃–0.4PbTiO₃

Chen

Zhang

Jia³

et al. 2022

Physica Status Solidi (a)

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The existence of polar nanoregions (PNRs) is the most important characteristic of ferroelectric relaxors; however, the size determination and the dynamic of PNRs remain uncertain. Herein, it is revealed that a re‐entrant relaxor behavior and ferroelectric–paraelectric transition coexist in complex perovskite oxide 0.6Bi(Mg1/2Ti1/2)O3‐0.4PbTiO3. Two dielectric anomalies, 1) the low‐temperature re‐entrant relaxor transition and 2) the high‐temperature diffuse phase transition (DPT), are described by the phenomenological statistical model. The sizes of the two kinds of PNRs corresponding to two ferroelectric states were obtained. The dynamics of PNRs are analyzed using isothermal electrical modulus, which shows three critical temperatures associated with the DPT, the formation, and freezing of PNRs, respectively. The temperature evolution of the PNRs evolution depends on the stoichiometry of bismuth. The results provide new insights into the dynamic behavior of PNRs and the modification way of re‐entrant relaxor behavior.

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Section: Resultsmentioning

confidence: 99%

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg_1/2Ti_1/2)O₃–0.4PbTiO₃

Chen

Zhang

Jia³

et al. 2022

Physica Status Solidi (a)

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“…Such T c decreases from 376 to 55 K as x varies from 0 to 0.30, and meanwhile, the sharp peaks change to frequency‐dependent broad peaks, suggesting the presence of relaxation behavior. Dielectric relaxation can be described by Lorentz‐type empirical relation

\frac{ε_{A}}{ε_{r}} = 1 + \frac{{false(T - T_{normalA} false)}^{2}}{2 δ_{normalA}^{2}}

where T A and

ε_{normalA}

are the temperature of dielectric peak and the dielectric constant at such temperature, respectively.

δ_{normalA}

reflects the diffuseness of dielectric peak and thus the larger its value, the greater the diffuse of phase transition.…”

Section: Resultsmentioning

confidence: 99%

Multiferroic Properties and Magnetoelectric Coupling of Fe‐Doped (Ba_0.7Ca_0.3)TiO₃‐Ba(Zr_0.2Ti_0.8)O₃ Ceramics

Gong

Huang

Shao

et al. 2019

Physica Status Solidi (a)

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Fe-doped (Ba 0.7 Ca 0.3 )TiO 3 -Ba(Zr 0.2 Ti 0.8 )O 3 (BCZT) ceramics are prepared by a conventional solid-state reaction method, and their structure, multiferroic, and coupling properties are investigated. Ferromagnetism and magnetoelectric coupling are successfully realized by Fe 3þ doping. Meanwhile, Fe 3þ doping in BCZT results in a gradual transition from typical ferroelectrics to relaxor ferroelectrics or even quantum paraelectrics. In consequence, obvious magnetodielectric (MD) effect is observed only among the morphotropic phase boundary (MPB) temperature range. For (Ba 1.7 Ca 0.3 )(Zr 0.2 Ti 1.7 Fe 0.1 )O 6 ceramics, the coexistence of ferroelectricity and ferromagnetism along with a large MD effect is obtained below 200 K. Herein, the results highlight the role of MPB on the magnetoelectric coupling of ferroelectrics with a percolating of magnetic ions.

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“…This model classifies individual dipoles into varies groups. Each have different dynamics and make distinctive contributions to the total dielectric permittivity [ 28 ]. An average potential-well-depth ( E b ), which is related to the size of PNRs, is used to characterize interactions between dipoles [ 29 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

B-Site Nanoscale-Ordered Structure Enables Ultra-High Tunable Performance

Peng

Wang

et al. 2022

Research

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Tunable devices constructed by ferroelectric thin films are often desired to possess a low dielectric loss while maintainging a high dielectric tunability over a broad operating temperature range in applications, for example, resonators, filters, or phase shifters. However, it is difficult to simultaneously achieve these characteristics by traditional strategies, such as doping and strain modifying. Here, we demonstrate that the dielectric tunability of the sol-gel-prepared Pb(Sc1/2Nb1/2)0.9(Mg1/3Nb2/3)0.1O3 (PSNMN) thin film can be almost doubled from ~47% to ~80.0% (at 10 kHz) at a low electric field (~530 kV/cm), and the dielectric loss can be sharply reduced by more than an order of magnitude, from ~0.50 to ~0.037 (at 1 kHz) when the thin film was annealed in air at 650°C for 15 h under the help of an atmosphere-compensating-block (ACB) made from the proto-PSNMN gel. Moreover, the PSNMN thin film annealed with ACB also exhibited an extremely high thermally-stable dielectric tunability in an ultrabroad temperature range (>130 K), which could be attributed to the Maxwell-Wagner (MW) effect generated by the interface between the PSNMN disordered matrix and the B-site nanoscale-ordered structure formed during the long-term annealing process. The reduced dielectric loss is mainly benefited from the reduced concentration of oxygen vacancy and the possible MW effects, and the enhanced dielectric tunability could be ascribed to the weaker domain-pinning effect by oxygen vacancy. The breakthrough provides a new universal strategy to achieve utrahigh tunable performance in A(B’1/2B”1/2)O3 ferroelectric thin films with a B-site nanoscale-ordered structure, meanwhile it paves the way for ultraintergrated tunable thin-film-devices with great phase shifter performance in practical applications.

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Revisiting the temperature‐dependent dielectric permittivity of Ba(Ti_1−xZr_x)O₃

Cited by 55 publications

References 38 publications

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg_1/2Ti_1/2)O₃–0.4PbTiO₃

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg_1/2Ti_1/2)O₃–0.4PbTiO₃

Multiferroic Properties and Magnetoelectric Coupling of Fe‐Doped (Ba_0.7Ca_0.3)TiO₃‐Ba(Zr_0.2Ti_0.8)O₃ Ceramics

B-Site Nanoscale-Ordered Structure Enables Ultra-High Tunable Performance

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Revisiting the temperature‐dependent dielectric permittivity of Ba(Ti1−xZrx)O3

Cited by 55 publications

References 38 publications

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg1/2Ti1/2)O3–0.4PbTiO3

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg1/2Ti1/2)O3–0.4PbTiO3

Multiferroic Properties and Magnetoelectric Coupling of Fe‐Doped (Ba0.7Ca0.3)TiO3‐Ba(Zr0.2Ti0.8)O3 Ceramics

B-Site Nanoscale-Ordered Structure Enables Ultra-High Tunable Performance

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Revisiting the temperature‐dependent dielectric permittivity of Ba(Ti_1−xZr_x)O₃

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg_1/2Ti_1/2)O₃–0.4PbTiO₃

Dynamic Behavior of Polar Nanoregions in Re‐Entrant Relaxor 0.6Bi(Mg_1/2Ti_1/2)O₃–0.4PbTiO₃

Multiferroic Properties and Magnetoelectric Coupling of Fe‐Doped (Ba_0.7Ca_0.3)TiO₃‐Ba(Zr_0.2Ti_0.8)O₃ Ceramics