Misfit strain-temperature phase diagram of multi-domain structures in (111)-oriented ferroelectric PbTiO3 films

Guo, Xiangwei; Wang, Y. J.; Zhang, H.; Tang, Yun; Zhu, Yin; Ma, Xiang

doi:10.1016/j.actamat.2020.06.053

Cited by 12 publications

(2 citation statements)

References 34 publications

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“…The phase diagrams of perovskite ferroelectric films clarify that the multiple phases/domains are stabilized at the critical misfit strain [13,15,16]. These multiple domain structures near the phase boundary possess nearly degenerated energies and could coexist on a large scale [17] and the fraction is dependent on the difference of the coexisting energy potential, which has a great impact on the formed domain structures [18]. Recently, thermodynamic analysis and phase-field simulations further confirm that large piezoelectric and dielectric responses arise at morphotropic phase boundaries, which may be attributed to the dense domain wall [19].…”

Section: Introductionmentioning

confidence: 94%

Strain Engineering of Domain Coexistence in Epitaxial Lead-Titanite Thin Films

Dong

Fan

et al. 2022

Coatings

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Phase and domain structures in ferroelectric materials play a vital role in determining their dielectric and piezoelectric properties. Ferroelectric thin films with coexisting multiple domains or phases often have fascinating high sensitivity and ultrahigh physical properties. However, the control of the coexisting multiple domains is still challenging, thus necessitating the theoretical prediction. Here, we studied the phase coexistence and the domain morphology of PbTiO3 epitaxial films by using a Landau–Devonshire phenomenological model and canonic statistical method. Results show that PbTiO3 films can exist in multiple domain structures that can be diversified by the substrates with different misfit strains. Experimental results for PbTiO3 epitaxial films on different substrates are in good accordance with the theoretical prediction, which shows an alternative way for further manipulation of the ferroelectric domain structures.

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Section: Introductionmentioning

confidence: 94%

Strain Engineering of Domain Coexistence in Epitaxial Lead-Titanite Thin Films

Dong

Fan

et al. 2022

Coatings

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“…The out-of-plane polarization vectors are increased by the non- c -axis textured growing in Aurivillius-type calcium bismuth niobate (CaBi 2 Nb 2 O 9 , CBN) piezoelectric films, which significantly improves the remnant polarization ( P r ). , The crystal quality of epitaxial films is usually superior to those of textured films or polycrystalline films with corresponding orientation, which may be beneficial to yield better performance. In some studies on ferroelectric and piezoelectric thin films, PbTiO 3 films, HfO 2 films, and Hf 0.5 Zr 0.5 O 2 films, to name a few, different orientation epitaxial films can be obtained on different oriented substrates. − And non- c -axis epitaxial films with twins crystals can be prepared on different (110) and (111) Nb-doped SrTiO 3 (Nb-STO) substrates which improves the P r . , In addition, the self-assembled nanobrick Bi 2 WO 6 film prepared on the (110)Nb-STO substrate achieves the regulation of the polarization vectors and provides a platform for possible new polarization switching . And the self-assembly technique possesses rich coupling effects, such as reducing the substrate-clamping effect, improving the piezoelectric properties of films, etc., which are widely studied in ferroelectric and multiferroic films. ,− Giant piezoelectricity was obtained in NaNbO 3 thin films with nanopillar structure .…”

Section: Introductionmentioning

confidence: 99%

Significantly Enhanced Electrostrain in Oriented Epitaxial Self-Assembled Aurivillius-Type Piezoelectric Films via Regulating Polarization Vectors

Hao

Ju³

et al. 2023

ACS Appl. Mater. Interfaces

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High-temperature piezoelectric films with excellent piezoelectric and ferroelectric properties lay the foundation for the development of high-temperature piezo-MEMS devices. However, due to the poor piezoelectricity and strong anisotropy, it remains a challenge to obtain high quality Aurivillius-type high-temperature piezoelectric films with high performance, which impedes their practical implements. Here, a feasible polarization vector regulation strategy associated with oriented epitaxial self-assembled nanostructures for enhancing electrostrain is proposed. Guided by lattice matching relation, non-c-axis oriented epitaxial self-assembled Aurivillius-type calcium bismuth niobate (CaBi2Nb2O9, CBN) high-temperature piezoelectric films were successfully prepared on different oriented Nb-STO substrates. By the lattice matching relationship, hysteresis measurement, and piezoresponse force microscopy analysis, it is confirmed that the polarization vectors transform from a two-dimensional plane to a three-dimensional space, and the out-of-plane polarization switching is enhanced. A platform for more possible polarization vectors is provided in the self-assembled (013)CBN film. More importantly, enhanced ferroelectric (P r ∼ 13.4 μC/cm2) and large strain (∼0.24%) were obtained in the (013)CBN film, which promotes the great application prospect of CBN piezoelectric films in high-temperature MEMS devices.

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