The influence of anneal time on exchange-coupling in Nd2Fe14B/α-Fe films

H. Jiang, M. J. O'Shea

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations


We study the influence of α-Fe content and anneal time on the magnetic properties and exchange-spring behavior of Nd2Fe14B/α-Fe thin films treated with a rapid (30 second) or standard (20 minute) anneal. A rapid anneal gives the highest energy product, 12.6 MGOe at an anneal temperature of 750 °C along with a coercivity of 10.8 kOe. The exchange-spring behavior was evaluated using recoil demagnetization curves. The reversibility of the recoil demagnetization curves increases with the α-Fe content. Analysis of these results indicate a dominant positive interaction between exchange coupled grains for the thin films as long as the Fe content is not too large.

Original languageEnglish
Pages (from-to)2579-2581
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number4 I
StatePublished - Jul 2001
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: Jan 7 2001Jan 11 2001


  • Energy product
  • Exchange spring
  • Hard magnet
  • Rapid anneal
  • Thin film


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