What question did this study set out to answer?

The study aims to explore how interfacial chemistry, electrostatics, and strain influence polarization in BiFeO3 films.

Control of Polarization and Polar Helicity in BiFeO 3 by Epitaxial Strain and Interfacial Chemistry

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This research demonstrates a method to stabilize polarization in ferroelectric films, suggesting new strategies for oxide electronics.

The study aims to explore how interfacial chemistry, electrostatics, and strain influence polarization in BiFeO3 films.
Grew BiFeO3 thin films on La0.7Sr0.3MnO3-buffered NdGaO3 substrates.
Utilized piezoresponse force microscopy and scanning transmission electron microscopy.
Investigated the effects of a Bi2O2-terminated Aurivillius film as a buffer layer.
Observed nanoscale domain architecture stabilized by a fluorite-like Bi2O2 surface layer.
Achieved uniform out-of-plane polarization in highly strained BiFeO3 films.
Revealed homohelicity in polarization textures through local polarization switching experiments.

Gradauskaite et al. (2026) studied this question.

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