Tailoring the spin density waves in Fe/Cr multilayers by selective inclusion of Sn, V and Mn

Amitouche, F.; Issolah, A.; Bouarab, S.; Vega, A.; Demangeat, C.

doi:10.1016/j.susc.2008.10.038

Cited by 5 publications

(3 citation statements)

References 41 publications

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“…This behaviour differs completely from that for the free Cr(210) surface [20], where the m Cr 1.8 μ B on surface layer atoms, i.e., it is tripled compared to the bulk. The magnetic configuration across the GB slab (figure 3) resembles that of the incommensurate spin density waves structure reported for pure chromium bulk [32], and the amplitude of the calculated m Cr is similar to that observed for Fe/Cr(001) multilayers [33], represented by thick slabs of Cr atoms separated by a few layers of Fe atoms, where the m Cr was reported to be below 0.5 μ B .…”

Section: Grain Boundaries In Pure Crsupporting

confidence: 75%

Effect of iron additions on intergranular cohesion in chromium

Ossowski

Wachowicz²,

Kiejna

2009

J. Phys.: Condens. Matter

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The structural, cohesive, and magnetic properties of (111) and (210) tilt grain boundaries (GBs) in pure Cr, and in Cr with Fe additions, are studied from first principles. Different concentration and position of solute atoms are considered. Our calculations show that Fe atoms placed in the GB interstice enhance cohesion, whereas Fe substituted for one of the Cr layer atoms, in most cases, has very small (or negligible) effect on the cohesion at GBs in Cr. We have found that Fe additions show a tendency to enrich the boundaries in Cr. In the presence of Fe additions the magnetic moments on the GB host atoms are substantially modified and those on Fe impurities are reduced. In most cases the moments on Fe additions remain much higher than the local moments on the Cr atoms.

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Section: Grain Boundaries In Pure Crsupporting

confidence: 75%

Effect of iron additions on intergranular cohesion in chromium

Ossowski

Wachowicz²,

Kiejna

2009

J. Phys.: Condens. Matter

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“…Its total energy is of course in competition with basic layered antiferromagnetic coupling. More precisely, there is a possibility of tailoring SDW in Fe/Cr (001) MLs through a selective inclusion of Sn, V and Mn MLs [13]. This study has been recently complemented by investigating X/Cr (001) MLs (X = Sn, V and Mn).…”

Section: Introductionmentioning

confidence: 99%

Unconstrained magnetism in nanostructures at zero temperature: An ultimate goal

Demangeat

Parlebas

2011

Comptes Rendus. Chimie

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Recent calculations have shown that the magnetization of nanostructures cannot be safely described by collinear models based on phenomenological Ising Hamiltonian or electronic structure approaches. When interactions between spins are screened by electronic clouds, a Heisenberg Hamiltonian presents a safe approach for ground state calculations as well as for the determination of temperature dependant magnetization. In metallic systems, due to strong interactions between spins, semi-empirical models like Extended Hu ¨ckel, tightbinding or Periodic Anderson Model (PAM) have been used. Within these oversimplified approaches, vector magnetization could be tested and, for nanostructures, it generally led to non-collinear ground states. Ab initio calculations based on Kohn-Sham techniques can also describe non-collinear ground states but, because these techniques work in k-space, periodicity is necessary. This is a strong approximation for nanostructures. Therefore, in the present short review, we essentially focus on non-collinear magnetism of nanostructures by means of PAM approaches.

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“…Cr/V is a unique system where the SDW state in Cr is conditioned by the hybridization between the very similar Fermi surfaces of Cr and V. In particular, the proximity effect of vanadium causes the occurrence of a magnetically dead layer near Cr/V interfaces [13][14][15] and strongly affects the global SDW properties, including the SDW polarization and propagation direction, the SDW period, and the Néel temperature [16,17]. In the present paper, we provide direct experimental evidence for a novel method of fine-tuning the spin-density-wave state in Cr/V heterostructures via hydrogen uptake.…”

Section: Introductionmentioning

confidence: 99%

Fine-tuning of the spin-density-wave state in Cr/V heterostructures via hydrogen uptake

Кравцов¹,

Nefedov²,

Nowak³

et al. 2009

J. Phys.: Condens. Matter

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We show that the magnetic state in rather thick Cr films can be finely tuned via hydrogen uptake into adjacent vanadium layers at rather low hydrogen pressures. By changing the hydrogen concentration and, hence, the electronic structure in the V layers, it is possible to affect the global properties of spin-density waves (SDWs) in Cr layers, including the SDW period and the Néel temperature. We provide direct experimental evidence that hydrogen uptake into V layers can be used to switch between incommensurate and commensurate SDW states in a reproducible way.

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Tailoring the spin density waves in Fe/Cr multilayers by selective inclusion of Sn, V and Mn

Cited by 5 publications

References 41 publications

Effect of iron additions on intergranular cohesion in chromium

Effect of iron additions on intergranular cohesion in chromium

Unconstrained magnetism in nanostructures at zero temperature: An ultimate goal

Fine-tuning of the spin-density-wave state in Cr/V heterostructures via hydrogen uptake

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