Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3 Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Zheng, Qunfei; Li, Qiang; Xue, Saidong; Wang, Limin; Zhang, Qian; Qin, Xiaomei; Zhao, Xiangyong; Wang, Feifei; Yang, Wenge

doi:10.1088/0256-307x/38/2/026102

Cited by 8 publications

(6 citation statements)

References 52 publications

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“…The fwhm and scattering intensity are of great significance for the study of the off-center displacement of the B-site cations. 47 However, the off-center displacement of cations at the A-site and the B-site are the essence of the spontaneous polarization of displacive ferroelectric materials, while high pressure is beneficial to BO 6 tilting 48 and reduces eccentric displacement of the B-site cation. Figure 3g, h display the intensity of the A 1g (ν 1 )/F 2g (ν 5 ) ratio versus pressures.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In order to discover more details in the variations of typical phonon modes, we can observe pressure-increase changes in KNN-LN and KNN-LN-1% MnO 2 by Raman spectral characteristics, such as intensity and full width of half maximum (fwhm). The fwhm and scattering intensity are of great significance for the study of the off-center displacement of the B-site cations . However, the off-center displacement of cations at the A-site and the B-site are the essence of the spontaneous polarization of displacive ferroelectric materials, while high pressure is beneficial to BO 6 tilting and reduces eccentric displacement of the B-site cation.…”

Section: Resultsmentioning

confidence: 99%

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Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K_0.5Na_0.5)NbO₃–0.05LiNbO₃ Single Crystals: Raman Scattering and Infrared Study

Yan

Cui

Dai

et al. 2022

ACS Appl. Mater. Interfaces

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Ferroelectric lead-free K x Na1–x NbO3 (KNN) perovskite, whose piezoelectric properties can be comparable to those of traditional Pb-based systems, has aroused wide concern in recent years. However, the specific influences of the stress field on KNN’s structure and piezoelectric properties have not been well clarified and there are few descriptions about the temperature–pressure phase diagram. Here, we analyzed the phonon mode behavior and structural evolution of K0.5Na0.5NbO3-0.05LiNbO3 (KNN-LN) and MnO2-doped single crystals with pressure- and temperature-dependent phase structure variations by theoretical calculation, polarized Raman scattering, and infrared reflectance spectra. The different phase structures can be predicted at high pressure using the CALYPSO method with its same-name code. The rhombohedral → orthorhombic → tetragonal → cubic phase transition process can be discovered in detail by Raman spectra under different temperatures and pressures. The phase coexistence on the thermal phase boundary was confirmed by basic anastomosis. Meanwhile, it was found that the substitution of Mn in the NbO6 octahedron aggravates the deformation of high pressure on KNN-LN and the substitution of Mn at the B-site intensifies the structural evolution more severely than at the A-site. The present study aims at exploring octahedra tilt, phonon vibrations, and the internal structure on the general critical phase boundary in KNN-LN crystals. It provides effective help for the study of lead-free perovskite phase transformation and the improvement in piezoelectric properties under a high-pressure field.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K_0.5Na_0.5)NbO₃–0.05LiNbO₃ Single Crystals: Raman Scattering and Infrared Study

Yan

Cui

Dai

et al. 2022

ACS Appl. Mater. Interfaces

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“…There was no new peak appearance, which meant that transstilbene crystal did not experience a phase transition during the whole compression up to 16.0 GPa. [33,34] Moreover, upon pressure released, the position of diffraction peaks unchanged. But the diffraction peaks were broadening and the intensity showed a slight reduction, which was attributed to the decrease of crystallinity after compression.…”

Section: Resultsmentioning

confidence: 97%

“…3(b)). [35,36] The modes in the frequency range before 500 cm −1 could be easily assigned to the deformation of molecular skeleton. [37] When the pressure was beyond 4.0 GPa, the peak at 118 cm −1 disappeared completely and the peak at 247 cm −1 (marked by red star) strengthened.…”

Section: Resultsmentioning

confidence: 99%

Two different emission enhancement of trans-stilbene crystal under high pressure: Different evolution of structure

Gu¹,

Shao²,

Tian³

et al. 2022

Chinese Phys. B

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Mechanoresponsive luminescent (MRL) materials have drawn extensive concern due to their potential applications in mechanical sensors, memory chips, and security inks; especially these possessing high emission efficiency. In this work, we found trans-stilbene crystal exhibited two different pressure-induced emission enhancement (PIEE) behaviors at different pressure areas. The structural characterizations combined with density functional theory calculation indicate that the first emission enhancement was due to the decrease of nonradiation transition by the weaken of energy exchange process between atoms and lattice. And the second emission enhancement was attributed to the strengthen of C–H…C interactions from the non-planarization comformation. The results regarding the mechanoresponsive behavior of trans-stilbene offered a deep insight into PIEE from the structural point of view, which will facilitate the design of and search for high-performance MRL materials.

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“…Electric dipoles within ferroelectrics can respond to external electrical stimuli, which allows ferroelectrics to store electrical energy. [1][2][3][4] When an electric field is applied through the two measured electrodes, the ferroelectric film capacitors are charged. After removing the external electric field, the stored electric energy is released in the scale of milliseconds.…”

Section: Introductionmentioning

confidence: 99%

Efficiently enhanced energy storage performance of Ba₂Bi₄Ti₅O₁₈ film by co-doping Fe³⁺ and Ta⁵⁺ ion with larger radius

Wu¹,

Zhao²,

Chen³

et al. 2022

Chinese Phys. B

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In this study, we present an efficient strategy, that is the co-substitution of Fe3+ and Ta5+ ions with large radius for Ti4+ ion, to enhance energy storage performance of Ba2Bi4Ti5O18 film. For the films co-doped with Fe3+ and Ta5+ ions, the maximum polarization under the same external electric field is improved because the radius of Fe3+ and Ta5+ ions is larger than that of Ti4+ ion. Moreover, due to the composition and chemical disorder, the relaxor properties are also slightly improved, which can not be achieved by the film doped with Fe3+ ions only. What’s more, for the films doped with Fe3+ ion only, the leakage current density increases greatly due to the charge imbalance, resulting in a significant decrease in breakdown strength. It is worth mentioning that the breakdown strength of Fe3+ and Ta5+ ions co-doped film does not decrease due to the charge balance. Another important point is the recoverable energy storage density of the films co-doped with Fe3+ and Ta5+ ions have been greatly improved based on the fact that the maximum external electric field does not decrease and the maximum polarization under the same external electric field increases. On top of that, the hysteresis of the polarization has also been improved. Finally, the co-doped films with Fe3+ and Ta5+ ions have good frequency and temperature stability.

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Pressure Driven Structural Evolutions of 0.935(Na_0.5Bi_0.5)TiO₃-0.065BaTiO₃ Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Cited by 8 publications

References 52 publications

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K_0.5Na_0.5)NbO₃–0.05LiNbO₃ Single Crystals: Raman Scattering and Infrared Study

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K_0.5Na_0.5)NbO₃–0.05LiNbO₃ Single Crystals: Raman Scattering and Infrared Study

Two different emission enhancement of trans-stilbene crystal under high pressure: Different evolution of structure

Efficiently enhanced energy storage performance of Ba₂Bi₄Ti₅O₁₈ film by co-doping Fe³⁺ and Ta⁵⁺ ion with larger radius

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Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3 Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Cited by 8 publications

References 52 publications

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K0.5Na0.5)NbO3–0.05LiNbO3 Single Crystals: Raman Scattering and Infrared Study

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K0.5Na0.5)NbO3–0.05LiNbO3 Single Crystals: Raman Scattering and Infrared Study

Two different emission enhancement of trans-stilbene crystal under high pressure: Different evolution of structure

Efficiently enhanced energy storage performance of Ba2Bi4Ti5O18 film by co-doping Fe3+ and Ta5+ ion with larger radius

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Product

Resources

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Pressure Driven Structural Evolutions of 0.935(Na_0.5Bi_0.5)TiO₃-0.065BaTiO₃ Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K_0.5Na_0.5)NbO₃–0.05LiNbO₃ Single Crystals: Raman Scattering and Infrared Study

Pressure- and Temperature-Induced Structural Phase Diagram of Lead-Free (K_0.5Na_0.5)NbO₃–0.05LiNbO₃ Single Crystals: Raman Scattering and Infrared Study

Efficiently enhanced energy storage performance of Ba₂Bi₄Ti₅O₁₈ film by co-doping Fe³⁺ and Ta⁵⁺ ion with larger radius