Native Oxidation and Complex Magnetic Anisotropy-Dominated Soft Magnetic CoCrFeNi-Based High-Entropy Alloy Thin Films

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

7 Scopus Citations
View graph of relations

Author(s)

  • Junyi Zhang
  • Xiao Wang
  • Xiaona Li
  • Yuehong Zheng
  • Renwei Liu
  • And 4 others
  • Junhua Luan
  • Zengbao Jiao
  • Chuang Dong
  • Peter K. Liaw

Detail(s)

Original languageEnglish
Journal / PublicationAdvanced Science
Volume9
Issue number33
Online published6 Oct 2022
Publication statusPublished - 24 Nov 2022

Link(s)

Abstract

Soft magnetic high-entropy alloy thin films (HEATFs) exhibit remarkable freedom of material-structure design and physical-property tailoring, as well as, high cut-off frequencies and outstanding electrical resistivities, making them potential candidates for high-frequency magnetic devices. In this study, a CoCrFeNi film with excellent soft magnetic properties is developed by forming a novel core–shell structure via native oxidation, with ferromagnetic elements Fe, Co, and Ni as the core and the Cr oxide as the shell layer. The core–shell structure enables a high saturation magnetization, enhances the electrical resistivity, and thus reduces the eddy-current loss. For further optimizing the soft magnetic properties, O is deliberately introduced into the HEATFs, and the O-incorporated HEATFs exhibit an electrical resistivity of 237 µΩ·cm, a saturation magnetization of 535 emu cm−3, and a coercivity of 23 A m−1. The factors that determine the ferromagnetism and coercivity of the CoCrFeNi-based HEATFs are examined in detail by evaluating the microstructures, magnetic domains, chemical valency, and 3D microscopic compositional distributions of the prepared films. These results are anticipated to provide insights into the magnetic behaviors of soft magnetic HEATFs, as well as aid in the construction of a promising material-design strategy for these unique materials.

Research Area(s)

  • electrical resistivity, high-entropy thin films, magnetic anisotropic, native oxidation, soft magnetic

Citation Format(s)

Native Oxidation and Complex Magnetic Anisotropy-Dominated Soft Magnetic CoCrFeNi-Based High-Entropy Alloy Thin Films. / Zhang, Junyi; Wang, Xiao; Li, Xiaona et al.
In: Advanced Science, Vol. 9, No. 33, 24.11.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Download Statistics

No data available