Permanent magnets are a key technology for modern society with applications in air conditioning, mobility or power generation. The measured coercive fields in modern permanent magnets reach only a small fraction of the theoretical values. A series of experimental studies have shown that discontinuities and misalignment at the atomic scale significantly affect the macroscopic coercivity. In this project, we develop a quantitative theory of coercivity, taking into account the local atomic structure, the spatial variation of the intrinsic magnetic properties, and the physical microstructure of the magnet. To achieve this goal we bridge the length scale between ab-initio simulations, atomistic spin dynamics and continuum micromagnetic simulations. Atomic defects at interfaces and grain boundaries will be considered already at the smallest possible length scale, the unit cells of the material composition. The developed theory is guided by well described magnetic materials to validate the system throughout the progress of the project.

Actual

On 20.5. we were able to inspire young and old at the Long Night of Research 2022. The influence of permanent magnets on electromobility was demonstrated at a hands-on station. Those interested were able to find out how magnets influence the performance of electric motors with simple experiments. With our project we were able to show how important it is to develop permanent magnets without critical rare earths materials.

Lange Nacht der Forschung 2022 Markus Gusenbauer, Harald Özelt

 

https://www.donau-uni.ac.at/de/aktuelles/veranstaltungen/2022/lange-nacht-der-forschung-2022.html

Lange Nacht der Forschung 2022

 

@ Details:

 

Auftraggeber:

FWF, Projekt: I I 5712-N

Details

Duration 01/11/2022 - 31/10/2025
Funding FWF
Program
Department

Department for Integrated Sensor Systems

Center for Modelling and Simulation

Principle investigator for the project (University for Continuing Education Krems) Dipl.-Ing.(FH) Dr. Markus Gusenbauer
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