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

Published

November 11, 2023

Author(s)

Willie Beeson, Dinesh Bista, Huairuo Zhang, Sergiy Krylyuk, Albert Davydov, Gen Yin, Kai Liu

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 high magnetic anisotropy materials in single-phase HEA thin films. Thin films of FeCoNiMnCu sputtered on thermally oxidized Si/SiO2 substrate at room temperature exhibit soft magnetic properties with a coercivity on the order of 10 Oe. After post-deposition rapid thermal annealing (RTA), the films exhibit a single face-centered cubic (fcc) 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. These results demonstrate a promising HEA approach to achieve high magnetic anisotropy materials using RTA.

Citation

Advanced Materials

Pub Type

Journals

Keywords

high entropy, magnetic anisotropy, rapid thermal annealing

Citation

Beeson, W. , Bista, D. , Zhang, H. , Krylyuk, S. , Davydov, A. , Yin, G. and Liu, K. (2023), Single-Phase L10-Ordered High Entropy Thin Films with High Magnetic Anisotropy, Advanced Materials (Accessed April 27, 2024)