Structure and soft magnetic properties of FeAl/FeN multilayered films with high BS and μ

Yong Zhang, Ping He, Dexin Wang, David J Sellmyer

Research output: Contribution to journalArticle

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Abstract

The structural and soft magnetic properties of FeAl/FeN multilayer films with high spontaneous induction BS and permeability μ are investigated. The thickness of the FeAl layer is fixed at about 675 Å, while that of the FeN layers is varied from 135 to 675 Å. For the larger thicknesses of FeN layer the X-ray diffraction patterns contain peaks from γ'-Fe4N and α-Fe. The peaks become narrower when the FeN layers become thicker. Atomic force microscopy reveals that the grain size is smaller for films with thinner layers of FeN. BS is high (16 kG) and almost independent of the thickness of the FeN layer. The coercivity Hc decreases and μ increases when the FeN layer becomes thinner. When the thickness of the FeN layer is 135 Å, the coercivity is low (about 1 Oe), μ is high (2000 at 13 MHz), and μ changes little from 1 to 13 MHz. These results can be understood qualitatively on the basis of an increase of μ caused by enhanced coherent rotation in small particles.

Original languageEnglish (US)
Pages (from-to)351-355
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume129
Issue number2-3
DOIs
StatePublished - Jan 2 1994

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Coercive force
Magnetic properties
magnetic properties
Multilayer films
Diffraction patterns
Atomic force microscopy
X ray diffraction
coercivity
induction
permeability
diffraction patterns
grain size
atomic force microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Structure and soft magnetic properties of FeAl/FeN multilayered films with high BS and μ. / Zhang, Yong; He, Ping; Wang, Dexin; Sellmyer, David J.

In: Journal of Magnetism and Magnetic Materials, Vol. 129, No. 2-3, 02.01.1994, p. 351-355.

Research output: Contribution to journalArticle

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abstract = "The structural and soft magnetic properties of FeAl/FeN multilayer films with high spontaneous induction BS and permeability μ are investigated. The thickness of the FeAl layer is fixed at about 675 {\AA}, while that of the FeN layers is varied from 135 to 675 {\AA}. For the larger thicknesses of FeN layer the X-ray diffraction patterns contain peaks from γ'-Fe4N and α-Fe. The peaks become narrower when the FeN layers become thicker. Atomic force microscopy reveals that the grain size is smaller for films with thinner layers of FeN. BS is high (16 kG) and almost independent of the thickness of the FeN layer. The coercivity Hc decreases and μ increases when the FeN layer becomes thinner. When the thickness of the FeN layer is 135 {\AA}, the coercivity is low (about 1 Oe), μ is high (2000 at 13 MHz), and μ changes little from 1 to 13 MHz. These results can be understood qualitatively on the basis of an increase of μ caused by enhanced coherent rotation in small particles.",
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N2 - The structural and soft magnetic properties of FeAl/FeN multilayer films with high spontaneous induction BS and permeability μ are investigated. The thickness of the FeAl layer is fixed at about 675 Å, while that of the FeN layers is varied from 135 to 675 Å. For the larger thicknesses of FeN layer the X-ray diffraction patterns contain peaks from γ'-Fe4N and α-Fe. The peaks become narrower when the FeN layers become thicker. Atomic force microscopy reveals that the grain size is smaller for films with thinner layers of FeN. BS is high (16 kG) and almost independent of the thickness of the FeN layer. The coercivity Hc decreases and μ increases when the FeN layer becomes thinner. When the thickness of the FeN layer is 135 Å, the coercivity is low (about 1 Oe), μ is high (2000 at 13 MHz), and μ changes little from 1 to 13 MHz. These results can be understood qualitatively on the basis of an increase of μ caused by enhanced coherent rotation in small particles.

AB - The structural and soft magnetic properties of FeAl/FeN multilayer films with high spontaneous induction BS and permeability μ are investigated. The thickness of the FeAl layer is fixed at about 675 Å, while that of the FeN layers is varied from 135 to 675 Å. For the larger thicknesses of FeN layer the X-ray diffraction patterns contain peaks from γ'-Fe4N and α-Fe. The peaks become narrower when the FeN layers become thicker. Atomic force microscopy reveals that the grain size is smaller for films with thinner layers of FeN. BS is high (16 kG) and almost independent of the thickness of the FeN layer. The coercivity Hc decreases and μ increases when the FeN layer becomes thinner. When the thickness of the FeN layer is 135 Å, the coercivity is low (about 1 Oe), μ is high (2000 at 13 MHz), and μ changes little from 1 to 13 MHz. These results can be understood qualitatively on the basis of an increase of μ caused by enhanced coherent rotation in small particles.

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