Magnetic properties of nanostructured CoSm/FeCo films

I. A. Al-Omari, D. J. Sellmyer

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

Co80Sm20/Fe65Co35 bilayer and multilayer films with Cr underlayers and overlayers have been fabricated and studied. All the samples prepared have in-plane anisotropy and the hysteresis loops were simple single loops for tFeCo300 indicating that the two phases are strongly exchange coupled. The magnetization of these samples is found to increase with increasing FeCo layer thickness for a fixed CoSm layer thickness. The coercivity, anisotropy constant, and anisotropy field for films with fixed CoSm layer thickness were found to decrease with increasing FeCo layer thickness. The magnetization squareness values of the hysteresis loops in the direction parallel to the film plane, for different CoSm and FeCo layer thicknesses, were found to be close to S0.75. The energy products for these samples vary from about 6 MG Oe at room temperature to 26 MG Oe at 30 K. The shape and the behavior of the initial loops and the minor loops suggest that wall pinning is the dominant coercivity mechanism in these films. Reversible demagnetization curves were measured and found to be consistent with the behavior expected for exchange-spring magnets.

Original languageEnglish
Pages (from-to)3441-3447
Number of pages7
JournalPhysical Review B
Volume52
Issue number5
DOIs
Publication statusPublished - 1995

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Magnetic properties
Anisotropy
Hysteresis loops
magnetic properties
Coercive force
Magnetization
Demagnetization
Multilayer films
anisotropy
coercivity
hysteresis
Magnets
magnetization
demagnetization
magnets
room temperature
curves
products
Temperature
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Magnetic properties of nanostructured CoSm/FeCo films. / Al-Omari, I. A.; Sellmyer, D. J.

In: Physical Review B, Vol. 52, No. 5, 1995, p. 3441-3447.

Research output: Contribution to journalArticle

Al-Omari, I. A. ; Sellmyer, D. J. / Magnetic properties of nanostructured CoSm/FeCo films. In: Physical Review B. 1995 ; Vol. 52, No. 5. pp. 3441-3447.
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