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Lorentz Scanning Transmission Electron Microscopy (STEM) has emerged as a powerful technique for studying complex magnetic topologies with nanoscale precision. By leveraging advances in electron optics, including aberration correction and phase imaging, corrected Lorentz STEM provides enhanced spatial resolution and contrast, allowing researchers to observe magnetic domains, skyrmions, vortices, and other topological structures.
Traditional Lorentz microscopy, while effective for visualizing magnetic structures, has limitations in spatial resolution and sensitivity, especially for weak magnetic signals. Corrected Lorentz STEM overcomes these resolution challenges, enabling unprecedented exploration of magnetic topologies. The technique offers a promising pathway for advancing our understanding of magnetic materials, with implications for data storage, quantum computing, and magnetic sensor technology. The talk will focus on the magnetic topologies within multiferroic Aurivillius thin films and ferromagnetic Fe3Sn single crystals.
About the speakers
Shelly Conroy, Lecturer in Functional Thin Films and Microscopy, Department of Materials - Faculty of Engineering, The Conroy group at Imperial
Dr. Conroy is a Royal Society University Research Fellow and lecturer in functional thin films and microscopy specializing in in-situ TEM, 4D-STEM, and EELS. The Conroy group at Imperial designs quantum and energy materials at the atomic scale using electron and atom probe microscopy techniques.
Dr. Conroy’s group is part of the new cryo-microscopy facility for engineering and physical sciences at Imperial, as well as the Royce Imperial “Atoms to Devices” thin film growth facility. In 2019, she was awarded an SFI Industry Research PI grant with Analog Devices.
She has previously held positions at University of Limerick and the Pacific Northwest National Laboratory. She holds a PhD in AlN thin film growth for optoelectronic device applications, FIB sample preparation for TEM, and in-situ TEM from Tyndall National Institute and University College Cork Ireland.
Maria Meledina, Product Manager, TEM, Materials Science
Dr. Meledina is a Product Manager in High End TEM for materials science at Thermo Fisher Scientific. Since joining the company’s R&D team in 2021, she has worked on application-driven development of TEM. Prior to her role at Thermo Fisher, Dr. Meledina focused on characterization and development of energy materials through advanced TEM while working at RWTH Aachen University and Research Centre Julich.
She earned her PhD in Physics from the EMAT center at the University of Antwerp, complementing her earlier academic background in materials science and chemistry. Dr. Meledina brings extensive expertise in the application of a broad range of advanced TEM techniques for materials development.