Compositional variation of magnetic moment, magnetic anisotropy energy and coercivity in Fe(1−x)M x (M = Co/Ni) nanowires: an ab initio study
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In this paper, the magnetic and electronic properties of freestanding Fe(1−x)M −Co/Ni nanowires were investigated using ab initio simulations, and the magnetic anisotropy energy of the nanowire was observed to change sign with the increase of Co and Ni content.Abstract:
Ab initio simulations are used to investigate the magnetic and electronic properties of freestanding Fe(1−x)M
x
(M = Co/Ni) nanowires. The stability of the nanowires increases with Co (Ni) addition, as seen from the increase in cohesive energy. With the addition of Co (Ni), the average magnetic moment shows a monotonic decrease, in contrast to the Slater–Pauling behavior observed in bulk Fe–Co/Ni alloys. The magnetic anisotropy energy of the nanowire is observed to change sign, from a parallel alignment of spins along the wire axis, to a perpendicular alignment with the increase of Co and Ni content. The magnetic anisotropy energy variation is seen to be correlated with the orbital moment anisotropy. The coercivity, as calculated using the Jacobs–Bean model is observed to decrease with Co (Ni) addition to the nanowire.read more
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References
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Journal ArticleDOI
An Approach to Elongated Fine-Particle Magnets
I. S. Jacobs,C. P. Bean +1 more
TL;DR: In this paper, the coercive force predicted by theory for single-domain particles with shape anisotropy frequently far exceeds the observed value, and several approximate models are suggested which may exist in certain experimental situations.
BookDOI
Advanced Magnetic Nanostructures
David J. Sellmyer,Ralph Skomski +1 more
TL;DR: In this paper, the authors proposed a spin-polarized electronic structure for spin electronics and applied it to hard-magnetic nanostructures for extremely high density recording.
Journal ArticleDOI
Cohesive energy of 3d transition metals: DFT atomic and bulk calculations.
TL;DR: The effect of going to nonspherical atomic charge distributions is much larger at the GGA than at the local-density approximation (LDA) level, but allowing fractional occupations of 3d and 4s shells has negligible effect.
Journal ArticleDOI
Broken symmetries in the crystalline and magnetic structures of γ-iron
Martijn Marsman,Juergen Hafner +1 more
TL;DR: In this article, it is shown that in near face-centered cubic Fe, stabilized by three-dimensional constraints, the magnetic ground state is a spin-spiral with propagation vector (q = 2.2,0,1) at an equilibrium atomic volume of $\ensuremath{\Omega}=10.63{\mathrm{\AA{}}}^{3},$ very close to the propagation vector.
Journal ArticleDOI
Spin and orbital magnetism in Fe-Co and Co-Ni alloys.
TL;DR: In this article, the authors used the linear muffin-tin orbital method and the virtual crystal approximation to calculate the spin and orbital moments of Fe-Co and Co-Ni alloys.