Fabrication of the preferentially orientated LiNbO3 nanoparticles and their ferroelectric behaviors

TL;DR

This paper reports the fabrication of (00l)-oriented LiNbO3 nanoparticles via pulsed laser deposition and annealing, demonstrating their ferroelectric properties and potential for studying nanoscale ferroelectric effects.

Contribution

It introduces a method to produce oriented LiNbO3 nanoparticles with preserved ferroelectricity, enabling further nanoscale ferroelectric research.

Findings

LiNbO3 nanoparticles exhibit ferroelectric hysteresis.

Nanoparticles maintain (00l) orientation after annealing.

Potential for studying size effects in ferroelectricity.

Abstract

(00l)-Oriented LiNbO3 ultra-thin film was fabricated on Pt/Ti/SiO2/Si substrate using pulsed laser deposition. The film shrunk into crystalline state nanoparticles that still kept (00l) preferential orientation as being annealed in the oxygen atmosphere at 500 oC for 2 hours. These LiNbO3 nanoparticles exhibited the ferroelectricity, showing asymmetrical hysteresis loop which might originate from the large internal field at the interface. These nanoparticles could be used for further studying on the size effects and the ferroelectricity of nanocrystal.