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 language | English |
|---|---|
| Pages (from-to) | 3441-3447 |
| Number of pages | 7 |
| Journal | Physical Review B |
| Volume | 52 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1995 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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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 journal › Article
}
TY - JOUR
T1 - Magnetic properties of nanostructured CoSm/FeCo films
AU - Al-Omari, I. A.
AU - Sellmyer, D. J.
PY - 1995
Y1 - 1995
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.52.3441
DO - 10.1103/PhysRevB.52.3441
M3 - Article
VL - 52
SP - 3441
EP - 3447
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 5
ER -