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

H. Jiang; M. J. O'Shea

doi:10.1109/20.951241

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

H. Jiang, M. J. O'Shea

Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-review

9 Scopus citations

Abstract

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 language	English
Pages (from-to)	2579-2581
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.951241
State	Published - Jul 2001
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001

Keywords

Energy product
Exchange spring
Hard magnet
Rapid anneal
Thin film

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title = "The influence of anneal time on exchange-coupling in Nd2Fe14B/α-Fe films",

abstract = "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.",

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N2 - 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.

AB - 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.

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