Anisotropy of W in Fe and Co

Kashyap, Arti; Manchanda, Priyanka; Sahota, P. K.; Skomski, Ralph; Shield, J. E.; Sellmyer, David J.

doi:10.1109/tmag.2011.2157317

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…Since Co3W has a low magnetization, it is possible that slightly smaller clusters may have local (short-range) ordering of the W which acts to suppress the magnetization as it does in Co3W. The decrease in magnetization is also consistent with theoretical calculations of W-doped Co (Kashyap et al 2011). As the particles get larger the energy penalty for forming the coherent interfaces is likely small compared to the formation enthalpy of a hyper-stoichiometric hcp Co with W. Further work is necessary to clarify this effect.…”

Section: Resultssupporting

confidence: 80%

“…The ideal materials require a high proportion of ferromagnetic elements such as Fe or Co. Recent theoretical work has shown that solid solutions of 5d transition metals in Co or Fe crystalline compounds induce an increase in magnetocrystalline anisotropy (Skomski et al 2010;Kashyap et al 2011), thus potential candidates for permanent magnet alloys. Because of their larger size, there is limited solubility of heavy transition metals, such as W, in the 3d elements, particularly Fe and Co.…”

Section: Introductionmentioning

confidence: 99%

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Solubility extension and phase formation in gas-condensed Co–W nanoclusters

et al. 2013

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CoW alloy clusters with extended solubility of W in hcp Co were produced by inert-gas condensation. The structural state of the as-deposited CoW clusters was found to be critically dependent on processing parameters such as the cooling scheme and sputtering power. For the water-cooled clusters, the mean size and percent crystalline were strongly dependent on sputtering power, while the percent crystalline of the liquid nitrogen-cooled clusters was not as affected by the sputtering power. At low sputtering powers, the water-cooled clusters were predominantly amorphous, but became increasingly more crystalline as the sputtering power increased. The predominant crystalline phase was hcp Co(W), but high-resolution transmission electron microscopy revealed that very small and very large clusters contained fcc and Co3W structures, respectively. For liquid nitrogen cooling the clusters were predominantly amorphous regardless of sputtering power, although at the highest sputtering power a small percentage of the clusters were crystalline. The magnetic properties were dependent on cooling schemes, sputtering power, and temperature, with the highest coercivity of 893 Oe obtained at 10 K for water-cooled clusters sputtered at 150 W. The magnetocrystalline anisotropy of the water-cooled sample increased with increasing sputtering power, with the highest anisotropy of 3.9 × 10 6 ergs/cm 3 recorded for clusters sputtered at 150 W. For liquid nitrogen-cooled samples, the anisotropy was approximately constant for all sputtering powers.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Solubility extension and phase formation in gas-condensed Co–W nanoclusters

et al. 2013

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“…figure 2e,f at 5 GHz). If the voltage signals are attributed to rectified anisotropic magnetoresistance in the metal layer due to proximity-induced ferromagnetic coupling across the interface, the voltage signal should have the same sign in both systems (see Supplementary Note 1 for further discussion [43,[46][47][48]). The inverse Rashba-Edelstein effect (IREE) at the NZAFO/metal interface is another proposed mechanism that generates a voltage peak from spin pumping [49], since the IREE has the same symmetry as ISHE.…”

Section: Electrical Detection Of Spin Pumpingmentioning

confidence: 99%

Spin-Current Generation in Low-Damping Ni0.65Zn0.35Al0.8
Gray
¹
,
Emori
²
,
Gray
³

et al. 2018
Phys. Rev. Applied
23
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0
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“…Theoretical calculations have suggested that compounds containing mixtures of 3d transition elements and 4d and 5d elements can have large magnetocrystalline anisotropy via large spin-orbit coupling. 49,50 One interesting approach is to look at marginally stable materials. Fe-Ni meteorites contain a magnetically hard FeNi compound having the L10 structure, called tetrataenite.…”

Section: Other Fe-based Compounds Without Rare Earth Elementsmentioning

confidence: 99%

Prospects for Non-Rare Earth Permanent Magnets for Traction Motors and Generators

Kramer

McCallum

Anderson

et al. 2012

JOM

265

148

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With the advent of high-flux density permanent magnets based on rare earth elements such as neodymium (Nd) in the 1980s, permanent magnet-based electric machines had a clear performance and cost advantage over induction machines when weight and size were factors such as in hybrid electric vehicles and wind turbines. However, the advantages of the permanent magnet-based electric machines may be overshadowed by supply constraints and high prices of their key constituents, rare earth elements, which have seen nearly a 10-fold increase in price in the last 5 years and the imposition of export limits by the major producing country, China, since 2010. We outline the challenges, prospects, and pitfalls for several potential alloys that could replace Nd-based permanent magnets with more abundant and less strategically important elements.

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Anisotropy of W in Fe and Co

Cited by 15 publications

References 13 publications

Solubility extension and phase formation in gas-condensed Co–W nanoclusters

Solubility extension and phase formation in gas-condensed Co–W nanoclusters

Spin-Current Generation in Low-Damping Ni0.65Zn0.35Al0.8
Gray
¹
,
Emori
²
,
Gray
³

et al. 2018
Phys. Rev. Applied
23
1
5
0
View full text Add to dashboard Cite

Prospects for Non-Rare Earth Permanent Magnets for Traction Motors and Generators

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Anisotropy of W in Fe and Co

Cited by 15 publications

References 13 publications

Solubility extension and phase formation in gas-condensed Co–W nanoclusters

Solubility extension and phase formation in gas-condensed Co–W nanoclusters

Spin-Current Generation in Low-Damping Ni0.65Zn0.35Al0.8Gray1, Emori2, Gray3 et al. 2018Phys. Rev. Applied23150View full textAdd to dashboardCite

Prospects for Non-Rare Earth Permanent Magnets for Traction Motors and Generators

Contact Info

Product

Resources

About

Spin-Current Generation in Low-Damping Ni0.65Zn0.35Al0.8
Gray
¹
,
Emori
²
,
Gray
³

et al. 2018
Phys. Rev. Applied
23
1
5
0
View full text Add to dashboard Cite