Welcome to the homepage of the
Hoffmann Research Group at the
Materials Research Laboratory of the
University of Illinois at Urbana-Champaign.
We explore the rational design rules and fundamental physics for new functional magnetic materials and devices
Our research group creates, explores and derives new insights into novel fundamental physics and new materials related to magnetic phenomena. Towards this end we synthesize a variety of thin film heterostructures and more complex lithographically patterned device concepts with the goal to understand and control their physical properties. We focus especially on emerging new phenomena associated with the competition between spatial and magnetic length scales, as well as proximity effects. Our vision is to understand the ultimate limits of miniaturization and prepare magnetic materials with designed functionalities. Thus we tailor properties via systematic control of preparation conditions and manipulate dimensionalities and geometric confinement by thin film deposition via sputtering and electron-beam evaporation combined with advanced patterning and templating techniques. Additional complexity comes from coupled heterostructures, which integrate ferromagnets, antiferromagnets, superconductors, and insulators. Cutting-edge characterizations include sophisticated magnetotransport measurements, broadband ferromagnetic resonance, and spatially resolved Brillouin light scattering microscopy. This infrastructure enables us to comprehensively investigate magnetization dynamics, magneto-transport phenomena, and interfacial coupling effects. These new phenomena push the boundaries of fundamental understanding of nanostructured magnetic materials and underlie novel applications ranging from information technologies to energy conversion.
A more detailed overview over our current research interests can be found here. Please take a look at the following video if you are interested in our current research activities:
We also like to discuss about magnetism (and other things) while enjoying some ice cream: