Unlocking the potential of perovskite ferroelectrics in electronics relies on a comprehensive understanding of their structure down to the atomic level. The critical components in this pursuit are structural imperfections that span multiple dimensions, including point defects, dislocations, domain walls, grain boundaries and nanodomains that interact with each other. Utilizing advanced atomic-scale scanning transmission electron microscopy with a 4D STEM pixelated detector allows us to analyze defect types, detect strain fields, observe charge density distribution, and study dynamic responses under external stimuli. In my talk, I will showcase various structural studies of ferroelectrics like bismuth ferrite, potassium sodium niobate and barium titanate. I will explore how the type, quantity and dynamics of structural defects impact local material properties, offering the potential to tailor these properties.
Dose assessment: from conceptual model to environmental radioactivity monitoring
Radionuclides are discharged into the environment from a variety of nuclear and radiation facilities, potentially causing harmful effects on human health and the environment. If discharges are likely to result in adverse radiological effects, they must be evaluated in...
