1. Single-Phase L1$_{0}$-Ordered High Entropy Thin Films with High Magnetic Anisotropy
- Author
-
Beeson, Willie B., Bista, Dinesh, Zhang, Huairuo, Krylyuk, Sergiy, Davydov, Albert V., Yin, Gen, and Liu, Kai
- Subjects
Condensed Matter - Materials Science - Abstract
The vast high entropy alloy (HEA) composition space is promising for discovery of new material phases with unique properties. We explore 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/SiO$_{2}$ 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 L1$_{0}$ high entropy intermetallic phase after RTA, along with high magnetic anisotropy and 3 orders of magnitude coercivity increase. These results demonstrate a promising HEA approach to achieve high magnetic anisotropy materials using RTA., Comment: 28 pages, including 4 figures and 6 pages of supporting information (5 SI figures and 2 SI tables)
- Published
- 2023
- Full Text
- View/download PDF