Dresden 2017 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 66: Poster 3

MA 66.19: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG2

Novel materials for antiferromagnetic spintronics — Jan Balluff, •Kevin Diekmann, Markus Meinert, and Günter Reiss — Bielefeld University

Antiferromagnetic spintronic devices often rely on antiferromagnets with large spin-orbit coupling and require a Néel temperature well above 300 K for room temperature operation. Currently, there is only a limited number of materials available that fulfill these criteria, such as PtMn, Ir_xMn_1−x, FeRh and a few others. These materials have in common that they contain a noble metal to some extent, which is obviously undesirable for a large-scale application of these materials due to the low availability and therefore high price.

Here we present an effort to identify novel antiferromagnetic Heusler compounds with high Néel temperature. We use high-throughput ab initio calculations to find stable phases and perform additional DFT calculations to identify the magnetic ground state and to determine the critical temperature. Overall, 69 Heusler compounds are identified as antiferromagnetic, of which 20 compounds are predicted to have T_N > 290 K. The method is applicable to arbitrary structure types and is not limited to Heusler compounds.