Structural origin of magnetic softening in a Fe-based amorphous alloy upon annealing

Xing Tong, Yan Zhang, Yaocen Wang, Xiaoyu Liang, Kai Zhang, Fan Zhang, Yuanfei Cai, Haibo Ke, Gang Wang, Jun Shen, Akihiro Makino, Weihua Wang

Research output: Contribution to journalArticlepeer-review

Abstract

The underlying structural origin of magnetic properties is still elusive in Fe-based amorphous alloys. In this study, distinctive soft magnetic properties were developed in Fe76Si9B10P5 amorphous ribbons through systematic design of annealing process. Combining with synchrotron radiation, high-resolution transmission electron microscopy and first principle ab initio molecular dynamic simulation, it is found that the atomic structural evolution both in short range order and medium range order is responsible for the magnetic softness at proper annealing temperature. In short range, formation of separated and densely coordinated Fe-metalloid clusters is instigated to adapt energy minimization, resulting in strengthening of ferromagnetic exchange interaction locally. In medium range, a homogeneous exchange-coupling from the uniformly strong and weak ferromagnetic regions is generated, which significantly weakens magnetic heterogeneity and leads to the excellent magnetic softness. Our findings may provide an effective/promising pathway to modulate the magnetic properties for Fe-based amorphous alloys, and give a comprehensive and quantitative understanding of the structure-properties relationship in amorphous materials.

Original languageEnglish
Pages (from-to)233-240
Number of pages8
JournalJournal of Materials Science and Technology
Volume96
DOIs
Publication statusPublished - 2022 Jan 10
Externally publishedYes

Keywords

  • Amorphous alloy
  • Atomic structure
  • Soft magnetic properties
  • Synchrotron radiation

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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