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MM: Fachverband Metall- und Materialphysik

MM 29: Poster II

MM 29.14: Poster

Dienstag, 19. März 2024, 17:00–19:00, Poster B

Tuning magnetic properties in high entropy alloys by exploiting its anti-Invar properties — •Lennart Endler¹, Benedikt Eggert¹, Katharina Ollefs¹, Asli Çakir², Mehmet Acet¹, and Heiko Wende¹ — ¹Faculty of Physics and CENIDE, University of Duisburg-Essen — ²Department of Metallurgical and Materials Engineering, Mugla University

Five or six-component high entropy alloys have been known in materials research for a long time and stand out due to their good mechanical properties [1]. CrMnFeCoNi, which has the same electronic configuration as fcc-Fe with an electron per atom ratio of e/a = 8, plays a crucial role here. Increasing the lattice constant in fcc-Fe changes the magnetic ordering from antiferromagnetic to ferromagnetic, which is also valid for CrMnFeCoNi [2]. Introducing interstitial carbon leads to a lattice expansion up to 0.02 Å [2]. Besides interstitial C, B can also be used to expand the volume of the lattice. Here, we investigate the effect of increasing interstitial C and B content on the structural and magnetic ordering by the combination of SEM, EDX, Mössbauer spectroscopy, XRD and magnetometry.
We acknowledge the financial support through the Deutsche Forschungsgemeinschaft wihtin the framework of the CRC/TRR270 HoMMage (Project 405553726-TRR270).

[1] B. Schuh et al., Acta Mater. 96, 258 (2015)
[2] M. Acet, AIP Adv. 9, 095037 (2019)

Keywords: High entropy alloys; Cantor alloy; Anti Invar effect; Magnetic properties