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Single‐Phase L10‐Ordered High Entropy Thin Films with High Magnetic Anisotropy
https://orcid.org/0000-0002-5207-7590
https://orcid.org/0000-0002-5168-0881
https://orcid.org/0000-0002-1984-1200
https://orcid.org/0000-0003-4573-9151
https://orcid.org/0000-0003-4512-2311
https://orcid.org/0000-0001-5827-5101
https://orcid.org/0000-0001-9413-6782
AbstractThe 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 demonstrate a promising HEA approach to achieve high magnetic anisotropy materials using RTA.
Single‐Phase L10‐Ordered High Entropy Thin Films with High Magnetic Anisotropy
https://orcid.org/0000-0002-5207-7590
https://orcid.org/0000-0002-5168-0881
https://orcid.org/0000-0002-1984-1200
https://orcid.org/0000-0003-4573-9151
https://orcid.org/0000-0003-4512-2311
https://orcid.org/0000-0001-5827-5101
https://orcid.org/0000-0001-9413-6782
AbstractThe 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 demonstrate a promising HEA approach to achieve high magnetic anisotropy materials using RTA.
Single‐Phase L10‐Ordered High Entropy Thin Films with High Magnetic Anisotropy
https://orcid.org/0000-0002-5207-7590
https://orcid.org/0000-0002-5168-0881
https://orcid.org/0000-0002-1984-1200
https://orcid.org/0000-0003-4573-9151
https://orcid.org/0000-0003-4512-2311
https://orcid.org/0000-0001-5827-5101
https://orcid.org/0000-0001-9413-6782
AbstractThe 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 demonstrate a promising HEA approach to achieve high magnetic anisotropy materials using RTA.
Single‐Phase L10‐Ordered High Entropy Thin Films with High Magnetic Anisotropy
Advanced Science
Beeson, Willie B. (author) / Bista, Dinesh (author) / Zhang, Huairuo (author) / Krylyuk, Sergiy (author) / Davydov, Albert V. (author) / Yin, Gen (author) / Liu, Kai (author)
2024-06-28
Article (Journal)
Electronic Resource
English
Single‐Phase L10‐Ordered High Entropy Thin Films with High Magnetic Anisotropy
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Single‐Phase L10‐Ordered High Entropy Thin Films with High Magnetic Anisotropy (Adv. Sci. 34/2024)
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