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Properties of a rare earth free L1(0)-FeNi hard magnet developed through annealing of FeNiPC amorphous ribbons

Authors
Kim, JihyeKim, SuminSuh, Jin-YooKim, Yong JinKim, Young KeunChoi-Yim, Haein
Issue Date
5월-2019
Publisher
ELSEVIER SCIENCE BV
Keywords
Hard magnet; L1(0)-FeNi phase; Amorphous alloy; Crystallization temperature; Order-disorder temperature; Superlattice
Citation
CURRENT APPLIED PHYSICS, v.19, no.5, pp.599 - 605
Indexed
SCIE
SCOPUS
KCI
Journal Title
CURRENT APPLIED PHYSICS
Volume
19
Number
5
Start Page
599
End Page
605
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/65823
DOI
10.1016/j.cap.2019.03.001
ISSN
1567-1739
Abstract
The rare-earth-free hard magnetic L1(0)-FeNi phase found in cosmic meteorites demonstrates potential as a next-generation permanent magnet. However, it is very difficult to artificially produce the L1(0)-FeNi phase due to the low atomic diffusion coefficients of Fe and Ni near the order-disorder transition temperature (similar to 320 degrees C). Therefore, FeNiPC amorphous alloy systems exhibiting crystallization temperature (T-x) near the transition temperature were investigated. The amorphous alloys were annealed at T-x, resulting in high atomic diffusion. The structural and microstructural characterizations of annealed ribbons revealed the formation of L1(0) -FeNi phase through observation of the superlattice peak. The magnetic property, such as coercivity (H-c), also indicated the formation of L1(0)-FeNi phase, because the maximum H-c value is 641 Oe after the annealing process.
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공과대학 (신소재공학부)
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