Regensburg 2022 – wissenschaftliches Programm

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SYUK: Symposium United Kingdom as Guest of Honor

SYUK 2: United Kingdom as Guest of Honor II

SYUK 2.1: Hauptvortrag

Mittwoch, 7. September 2022, 15:00–15:30, H2

Hysteresis Design of Magnetic Materials for Efficient Energy Conversion — •Oliver Gutfleisch — TU Darmstadt, Material Science

High performance permanent magnets are key components of energy-related technologies, such as direct drive wind turbines and e-mobility. They are also important in robotics and automatization, sensors, actuators, and information technology. The magnetocaloric effect is the key for new and disruptive solid state-based refrigeration. Magnetic hysteresis and its inherent energy product - characterises the performance of all magnetic materials. Despite considerable progress in the modelling, characterisation and synthesis of magnetic materials, hysteresis is a long-studied phenomenon that is still far from being completely understood. Discrepancies between intrinsic and extrinsic magnetic properties remain an open challenge and magnets do not operate yet at their physical limits. Basic material requirements, figure of merits, demand and supply, criticality of strategic elements are explained for both permanent magnets and magnetocalorics referring to the benchmark materials NdFeB and LaFeSi. The search for perfect defects is driving the material design strategy.

This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) Project-ID 405553726 CRC - TRR 270 - Cooperate Research Center HoMMage.