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

Jihye Kim, Sumin Kim, Jin Yoo Suh, Yong Jin Kim, Young Keun Kim, Haein Choi-Yim

Research output: Contribution to journalArticle

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 (∼320 °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.

Original languageEnglish
Pages (from-to)599-605
Number of pages7
JournalCurrent Applied Physics
Volume19
Issue number5
DOIs
Publication statusPublished - 2019 May 1

Fingerprint

Amorphous alloys
Rare earths
ribbons
Superconducting transition temperature
Magnets
magnets
rare earth elements
transition temperature
Annealing
Meteorites
annealing
Order disorder transitions
meteorites
Crystallization
Coercive force
permanent magnets
Permanent magnets
coercivity
Magnetic properties
diffusion coefficient

Keywords

  • Amorphous alloy
  • Crystallization temperature
  • Hard magnet
  • L1 -FeNi phase
  • Order-disorder temperature
  • Superlattice

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Properties of a rare earth free L1 0 -FeNi hard magnet developed through annealing of FeNiPC amorphous ribbons . / Kim, Jihye; Kim, Sumin; Suh, Jin Yoo; Kim, Yong Jin; Kim, Young Keun; Choi-Yim, Haein.

In: Current Applied Physics, Vol. 19, No. 5, 01.05.2019, p. 599-605.

Research output: Contribution to journalArticle

Kim, Jihye ; Kim, Sumin ; Suh, Jin Yoo ; Kim, Yong Jin ; Kim, Young Keun ; Choi-Yim, Haein. / Properties of a rare earth free L1 0 -FeNi hard magnet developed through annealing of FeNiPC amorphous ribbons In: Current Applied Physics. 2019 ; Vol. 19, No. 5. pp. 599-605.
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AU - Choi-Yim, Haein

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