Lorentz Scanning Transmission Electron Microscopy (STEM) technique has emerged as a powerful tool 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, allowing us to probe magnetic topologies never before possible. 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.
Presenters:
Lecturer in Functional Thin Films and Microscopy, Department of Materials - Faculty of Engineering, The Conroy group at Imperial
RMS Organisers:
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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.
Her group is part of the new cryo-microscopy facility for engineering and physical sciences at Imperial and the Royce Imperial “Atoms to Devices” thin film growth facility. In 2019, Dr. Conroy 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.
Product Manager, High End TEM, Materials Science
Dr. Meledina is a Product Manager in High End TEM for materials science at Thermo Fisher Scientific. She joined the company’s R&D team in 2021 and worked on application-driven development of TEM. Prior to her role at Thermo Fisher Dr. Meledina focused on characterisation and development of energy materials through advanced TEM while working at RWTH Aachen University and Research Centre Julich.
Holding the PhD in Physics earned at EMAT, the University of Antwerp and previous degrees in materials science and chemistry Maria has an extensive experience in applying a broad range of advanced TEM techniques for materials development.