TU Darmstadt, Material Science, Germany

报告摘要：

High performance hard and soft 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 (MCE) 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, the so-called Brown´s paradox, and magnets do not operate yet at their physical limits. Basic material requirements, figure of merits, demand and supply, criticality of strategic elements and their recycling are explained for both permanent magnets and magnetocalorics referring to the benchmark materials NdFeB and LaFeSi. New research avenues given by compositionally complex alloys (CCA), where the duality or unusual combinations of functional and mechanical properties can be explored, will be elucidated looking at soft magnetic materials. The search for perfect defects is driving the material and microstructure design strategy.

报告人简介：

Oliver Gutfleisch is a full Professor (W3) for Functional Materials at TU Darmstadt. He studied Material Science at TU Berlin, did his PhD in Birmingham, UK, and was a group leader at Leibniz Institute IFW Dresden. 2012 he joined TU Darmstadt, since then he also served as one of the scientific directors in the build-up of the Fraunhofer IWKS Materials Recycling and Resource Strategies; from 2022 he continues this activity in an advisory role. Oliver Gutfleisch has published more than 530 papers in refereed journals, and has given more than 280 invited talks. In 2011, he was an IEEE Magnetics Society Distinguished Lecturer on the topic of Magnet Materials for Energy. In April 2017 he was awarded an EU ERC Advanced Grant (Cool Innov) and in September 2018 he received the Prize of the German Materials Society (DGM Prize 2018). He is since 2020 the speaker of the DFG Cooperate Research Center CRC270 HoMMage - Hysteresis Design of Magnetic Materials for Efficient Energy Conversion. He was elevated to IEEE Fellow in 2020, received the REPM 2021 achievement award and is running the external Max-Planck Research Group De Magnete at MPI for Sustainable Materials Düsseldorf since October 2020.

地点：中国科学院物理研究所M楼249会议室

邀请人：胡凤霞（8264 9233）

联系人：胡颖（8264 9361）