Noah Schnitzer

Noah Schnitzer is a Marie Skłodowska-Curie Postdoctoral Fellow in Shelly Conroy’s group at Imperial College London, where he develops and applies scanning transmission electron microscopy (STEM) methods to study complex oxide and magnetic materials. He completed his PhD at Cornell University supervised by Lena F. Kourkoutis and David Muller focused on STEM at cryogenic temperatures. His research combines atomic-resolution imaging, electron energy-loss spectroscopy, 4D-STEM and electron ptychography under in situ conditions to connect atomic structure and function at the nanoscale. 

This lecture will introduce transmission electron microscopy as a tool for structural and magnetic characterisation. We will begin with the basics of electron–sample interactions and the two main operating modes, conventional TEM and scanning TEM (STEM). We will then cover atomic-resolution imaging and four-dimensional STEM (4D-STEM) for mapping structure, strain and defects. The second half will focus on magnetic imaging, starting with Lorentz TEM and then turning to Lorentz STEM methods, including differential phase contrast, 4D-STEM and Lorentz ptychography. Each technique will be illustrated with examples and case studies on magnetic and multiferroic materials.