Activation energy mediated band structure in strained multiferroic BiFeO3 thin films

Shao, Fei; Chen, J.K.; Chew, Khian−Hooi; Zhao, Guijuan; Ren, Zhongkai; Liu, P.F.; Liu, Q.; Teng, Jun; Xu, Xiulan; Miao, Jun; Jiang, Yong

doi:10.1016/j.ceramint.2019.11.177

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…In previous reports, the R-phase was found to have a higher dielectric constant compared to the Tphase or the mixed phase in both doped BFO films and ceramics. 43,44 Similarly, the dielectric constant of the R-phase of the (001)-oriented PZN-PT single crystal is even more than 6 times larger than that of the T-phase. This is because the polarization direction in the R-phase does not coincide with the spontaneous polarization direction.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Liu

Lao

et al. 2022

ACS Appl. Mater. Interfaces

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Ferroelectric solid solutions with composition near the morphotropic phase boundary (MPB) have gained extensive attention recently due to their excellent ferroelectric and piezoelectric properties. Here, we have demonstrated a strategy to realize the controllable preparation of BiFeO 3 −BaTiO 3 (BF−BT) epitaxial films near the MPB. A series of high-quality BF−BT films were fabricated by pulsed laser deposition via adjusting oxygen partial pressure (PO 2 ) using a BF−BT ceramic target. A continuous transition from rhombohedral to tetragonal phase was observed upon increasing PO 2 . Particularly, the film with a pure tetragonal phase exhibited a large remnant polarization of ∼90.6 μC/cm 2 , while excellent piezoelectric performance with an ultrahigh strain (∼0.48%) was obtained in the film with coexisting rhombohedral and tetragonal phases. The excellent ferroelectric and piezoelectric properties endow the BF−BT system near the MPB with great application prospects in lead-free electronic devices.

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Section: Resultsmentioning

confidence: 99%

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Liu

Lao

et al. 2022

ACS Appl. Mater. Interfaces

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“…Few studies can be found on the temperature dependence of BiFeO 3 film properties. The permittivity increases with the increase of the temperature in the temperature range from −193 • C to 27 • C [206] and then it remains stable up to 400 • C [207].…”

Section: Bifeomentioning

confidence: 99%

Material strategies to enhance the performance of piezoelectric energy harvesters based on lead-free materials

Bartasyte

Clementi

Micard

et al. 2023

J. Micromech. Microeng.

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Over the past four decades, energy microsources based on piezoelectric energy harvesting have been intensively studied for applications in autonomous sensor systems. The research is triggered by the quest for replacing standard lead-based piezoelectric ceramics with environmentally friendly lead-free materials and potential deployment of energy-harvesting microsystems in internet of things, internet of health, “place and leave” sensors in infrastructures and agriculture monitoring. Moreover, futher system miniaturization and co-integration of functions are required in line with a desired possibility to increase the harvested power density per material volume. Thus, further research efforts are necessary to develop more sustainable materials/systems with high-performance. This paper gives a comprehensive overview on the processing and functional testing the lead-free bulk materials and thin films and discuss their potential in the applications in the stress- and strain-driven piezoelectric energy harvesting. This includes the methodology of estimation of the substrate clamping and orientation/texture effects in the thin films, and identification of orientations offering high figure of merit. The ability to control film orientation of different lead-free materials is reviewed and the expected piezoelectric performances are compared with the ones reported in literature.

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“…The rational utilization of oxygen vacancies, by introducing an impurity band as an intermediate band among the band gap of ferroelectric semiconductors by controlling the content of oxygen vacancies in ferroelectrics, can effectively improve the photovoltaic effect of BiFeO 3 [30]. Furthermore, another method of improving the performance of BFO is to fabricate BFO films, which introduce stress into thin films via a lattice mismatch [31]. The leakage problems associated with the defective BFO crystal structure have been solved when films are grown using special methods, such as PLD [32], chemical solution deposition [33] and aerosol assisted chemical vapor deposition [34].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of ferromagnetism in a multiferroic La–Co co-doped BiFeO₃ thin films

Song¹,

Jia²,

Wang³

et al. 2022

J. Phys. D: Appl. Phys.

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BiFeO3 (BFO) based materials have attracted much attention due to its room-temperature multiferroic properties and ultrahigh ferroelectric polarization. La and Co co-doped BiFeO3 (BLFCO) thin films were fabricated on Pt (111)/Ti/SiO2/Si substrate buffered by Nb (0.7 wt. %)doped SrTiO3 (NSTO) via the pulsed laser deposition. The experiments revealed that the film deposited at 0.2 Pa was predominant orientation of BFO (111), and its surface root-mean-square roughness was 0.96 nm. The saturation magnetization of the film reached 25.3 emu/cm3, which was an order of magnitude higher than that of pure BFO film, and it was attibuted to the predominant orientation and small grain size of BLFCO films. These results are helpful to furtherly improve the performance of BFO multi-functional devices.

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Activation energy mediated band structure in strained multiferroic BiFeO3 thin films

Cited by 5 publications

References 46 publications

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Material strategies to enhance the performance of piezoelectric energy harvesters based on lead-free materials

Enhancement of ferromagnetism in a multiferroic La–Co co-doped BiFeO₃ thin films

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Activation energy mediated band structure in strained multiferroic BiFeO3 thin films

Cited by 5 publications

References 46 publications

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO3–BaTiO3 Epitaxial Films Near Morphotropic Phase Boundary

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO3–BaTiO3 Epitaxial Films Near Morphotropic Phase Boundary

Material strategies to enhance the performance of piezoelectric energy harvesters based on lead-free materials

Enhancement of ferromagnetism in a multiferroic La–Co co-doped BiFeO3 thin films

Contact Info

Product

Resources

About

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Enhancement of ferromagnetism in a multiferroic La–Co co-doped BiFeO₃ thin films