Single-Phase L1₀-Ordered High Entropy Thin Films with High Magnetic Anisotropy.

ABSTRACT: The vast high entropy alloy (HEA) composition space is promising for discovery of new material phases with unique properties. This study explores the potential to achieve rare-earth-free high magnetic anisotropy materials in single-phase HEA thin films. Thin films of FeCoNiMnCu sputtered on thermally oxidized Si/SiO₂ substrates at room temperature are magnetically soft, with a coercivity on the order of 10 Oe. After post-deposition rapid thermal annealing (RTA), the films exhibit a single face-centered-cubic phase, with an almost 40-fold increase in coercivity. Inclusion of 50 at.% Pt in the film leads to ordering of a single L1₀ high entropy intermetallic phase after RTA, along with high magnetic anisotropy and 3 orders of magnitude coercivity increase. These results

SUBMITTER: Beeson WB 

PROVIDER: S-EPMC11426066 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature