SKM 2023 – wissenschaftliches Programm

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SYGM: Symposium Green Magnets for Efficient Energy Conversion

SYGM 1: Green Magnets for Efficient Energy Conversion

SYGM 1.4: Hauptvortrag

Montag, 27. März 2023, 16:45–17:15, HSZ 01

Thin film combinatorial studies of hard magnetic materials — •Nora Dempsey — Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL, 38000 Grenoble, France

Combinatorial thin film studies are used for the screening and optimization of a range of functional materials. The basic idea is to produce compositionally graded films, to allow high throughput characterisation of materials properties as a function of composition, as well as other processing parameters such as deposition temperature and post-deposition annealing conditions. This approach holds much potential for the development of green magnets for efficient energy conversion. In particular, it can be used to study the effect of element substitution in Rare Earth - Transition Metal hard magnetic phases, so as to reduce dependence on critical rare earth elements.

In this talk I will present both recent [1] and on-going studies of compositionally graded hard magnetic materials produced by sputtering asymmetric targets or co-sputtering of multiple targets followed by annealing under different conditions. I will discuss the influence of composition and processing parameters on structural and magnetic properties, as probed using high throughput scanning mode characterisation tools (EDX, XRD and MOKE). I will finish up by presenting future prospects for such studies, in particular when combined with ab-initio calculations on the one hand and machine learning on the other.

[1] Y. Hong et al., J. Mater. Res. Technol. 18 (2022) 1245