Exploring domain cross-talk and cycling effects in polycrystalline ferroics

Polycrystalline ferroics form the basis of many device technologies, including sensors and actuators. Recently, there has been increasing interest in the investigation of the domain patterns in polycrystalline ferroelectrics. The polycrystallinity influences the ferroelectric domain structure within the single crystal grains, due to the elastic and electrostatic compatibility that exists between grains. As a result, polycrystalline ferroics have intricate domain patterns and the characterisation of the domains are a challenge and generally considered to be difficult. In this study, polycrystalline BaTiO₃ is used as a model system to investigate domain compatibility across grains and their associated domain dynamics under in-situ heating conditions. This will involve characterisation of the grains by electron backscatter diffraction (EBSD), lamellae fabrication by focused ion beam (FIB) and subsequently in-situ heating transmission electron microscopy (TEM) studies.

Biography

I joined CDT PIADS in September 2017 after completing a MSci degree in Chemistry at Queen’s University Belfast. I am passionate about promoting diversity and inclusivity in STEM through public engagement activities. My research interests include in-situ electron microscopy and ferroelectric materials.

Research interests

• Ferroelectrics
• Polycrystalline materials
• Electron Microscopy
• In-situ microscopy