AI Article Synopsis
- * A new strategy using oriented epitaxial self-assembled nanostructures has been proposed to enhance electrostrain and improve polarization vector configuration in Aurivillius-type calcium bismuth niobate (CaBiNbO, CBN) films.
- * The research confirmed that non-axis oriented CBN films show improved out-of-plane polarization and significant enhancements in ferroelectric performance (∼13.4 μC/cm) and strain (∼0.24%), suggesting promising applications for these films in high-temperature
Article Abstract
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--axis oriented epitaxial self-assembled Aurivillius-type calcium bismuth niobate (CaBiNbO, 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 ( ∼ 13.4 μC/cm) 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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| http://dx.doi.org/10.1021/acsami.3c02650 | DOI Listing |
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