2021年12月29日 · One of the most powerful ways to harness nanoscale flexoelectricity is to press the surface of a material through an atomic force microscope (AFM) tip to generate large strain gradients.

2019年7月23日 · One example is that the flexoelectricity in thin films has a significant effect on the orientation of the ferroelectric polarisation . Another example is that by varying oxygen partial pressure during film growth to generate strain gradient in HoMnO 3 thin films, the polarisation orientation and domain distributions are influenced by the ...

2017年9月20日 · By combining Kelvin probe force microscopy imaging and phase-field simulations, we show that oxygen vacancies can move under a stress-gradient-induced depolarisation field. When tailored, this...

Nanoscale flexoelectricity in oxide thin films is an emerging research area that holds immense promise for future practical device applications, owing to their remarkable material suitability. The primary focus of current research within this field is to delve deeper into the understanding of the flexoelectric effect and its underlying mechanisms.

2019年2月1日 · Here, we demonstrate that a systematic control of quantum tunnelling through a paraelectric ultrathin SrTiO 3 (STO) film by flexoelectric polarisation allows characterising nanoscale...

Flexoelectricity, an intrinsic property observed in materials under nonuniform deformation, entails a coupling between polarization and strain gradients. Recent catalyst advancements have reignited interest in flexoelectricity, particularly at the nanoscale, where pronounced strain gradients promote robust flexoelectric effects.

2025年1月1日 · Flexoelectricity with size-dependent induced polarization under nonuniform stress for high-efficient energy conversion has shown considerable potential in energy harvesting and electronic devices. By introducing material microstructure design and tip-force, the distribution of nonuniform stress can be remarkably enhanced and the flexoelectric ...

By combining Kelvin probe force microscopy imaging and phase-field simulations, we show that oxygen vacancies can move under a stress-gradient-induced depolarisation field. When tailored, this nanoscale flexoelectric effect enables a controlled spatial modulation.

2013年11月1日 · They engineered the strain gradient in thin films by varying oxygen partial pressure conditions during film growth. They estimated the electric field in two thin films grown under different oxygen pressures to be 0.7 MV m −1 and 5 MV m −1 , and found that averaged ratios of up- to down-domain widths are 0.8 and 3.2, respectively, meaning ...

2024年1月1日 · Flexoelectricity provides a variety of materials choice along with promising applications in sensors, actuators, transducers, and energy harvesting are explained. In addition to these uses, the most recent flexoelectricity experimental and computational research efforts suggest that they can aid in advancing nanoelectronics and novel applications.