4.7 Article

Influence of magnetic field heat treatment on the microstructures and coercivity in ferromagnetic amorphous alloys

Journal

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 21, Issue -, Pages 4699-4707

Publisher

ELSEVIER
DOI: 10.1016/j.jmrt.2022.11.060

Keywords

Fe-based amorphous alloy; Magnetic field annealing; Coercivity; Microstructure; Crystallization

Funding

  1. National Natural Science Foundation of China [51901041, 51871056]
  2. National Key Research and Development Program of China [2021YFB3800504]
  3. Department of Education of Guangdong in China [2021KCXTD050, 2018KZDXM069]
  4. Silver age experts subsidy of Guangdong Province in China [2021A1313030078]
  5. MCIN/AEI [PID2020-112975 GB-I00]
  6. Generalitat de Catalunya [2017-SGR-42]

Ask authors/readers for more resources

This study clarifies the effect of small magnetic fields on the magnetic properties and microstructure in FeCoSiBPC amorphous alloys. The results show that small fields can decrease the coercivity Hc and affect the crystallization growth and proportion of bcc-Fe(Co) phase.
To clarify the effect of small magnetic fields on the magnetic properties and microstructure in FeCoSiBPC amorphous alloys, a magnetic field with different directions and various intensities was applied. The results show that the static field in orthogonal directions could all decrease Hc. Small fields like 50 Oe are also effective in reducing the Hc. The micro-structure of the samples annealed with and without field were compared to figure out the effect of the magnetic field on the Hc. A change in the crystallization growth between field heat treated samples and non-field heat treated samples is observed where the field initially hinders crystallization to accelerate it at longer times. Small magnetic fields could also affect the proportion of bcc-Fe(Co) phase with different Co coordination number and are effective in aligning the magnetic domain, which could result in lower Hc by sweeping pinning site. The magnetic softening and magnetic hardening mechanism are also discussed.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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