Talk given by

Prof. Dr. Rafal E. Dunin-Borkowski
Director, Institute for Microstructure Research
Director, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons
Peter Gruenberg Institute
Research Centre Juelich
Juelich, Germany

Abstract:

Transmission electron microscopy (TEM) has been revolutionised in recent years, 
both by the introduction of new hardware such as field-emission electron guns, 
aberration correctors and in situ stages and by the development of new techniques, 
algorithms and software that take advantage of increased computational speed and 
the ability to control and automate modern electron microscopes. 

In this talk, I will describe how the specialised TEM technique of electron holography, 
in combination with a model-based approach for the reconstruction of magnetization 
distributions from electron optical phase images, can be used to image the magnetic 
properties of materials with close-to-atomic spatial resolution, both in projection and 
in three dimensions. I will present results obtained from individual magnetic 
nanocrystals, as well as from magnetic skyrmions in extended films and geometrically-
confined structures fabricated using focused ion beam milling. I will also provide an 
overview of other TEM-based research in the Ernst Ruska-Centre in Jülich and conclude 
with a personal perspective on directions for the future development of transmission 
electron microscopy.