<i>Ab initio</i>giant magnetoresistance and current-induced torques in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Cr</mml:mi><mml:mo>∕</mml:mo><mml:mi mathvariant="normal">Au</mml:mi><mml:mo>∕</mml:mo><mml:mi mathvariant="normal">Cr</mml:mi></mml:mrow></mml:math>multilayers

Haney, Paul M.; Waldron, Derek; Duine, R. A.; Núñez, Álvaro S.; Guo, Hong; MacDonald, Allan H.

doi:10.1103/physrevb.75.174428

Cited by 79 publications

(48 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most obvious direction towards improved understanding is to grow high-quality epitaxial layered structures, perhaps Cr/Au systems like those discussed theoretically by Haney et al [13]. This route would however require a large investment in epitaxial growth research.…”

Section: Discussionmentioning

confidence: 99%

“…Explicit calculations, originally by Núñez et al [7] for toy model antiferromagnets and later by Haney et al [13], Haney & MacDonald [9] and Xu et al [14] using ab initio methods for chemically realistic but structurally idealized models, have established a number of properties of STTs in circuits containing AFM nanomagnets: (i) torques do in general act on the collective moment orientations of antiferromagnets and can be even larger than the torques that act in ferromagnets, (ii) changes in AFM nanoparticle orientation do alter the resistance of a circuit in which they are embedded, and (iii) the presence of an antiferromagnet in a circuit can contribute to torques that act on F elements of the same circuit. These results have been established by considering specific types of magnetic order and nanoparticle interfaces that have prefect structural order.…”

Section: Theoretical Concepts For Current-induced Torques In Antiferrmentioning

confidence: 99%

See 1 more Smart Citation

Antiferromagnetic metal spintronics

MacDonald

Tsoi

2011

Phil. Trans. R. Soc. A.

Self Cite

303

255

View full text Add to dashboard Cite

In this brief review, we explain the theoretical basis for the notion that spin-transfer torques (STTs) and giant-magnetoresistance effects can, in principle, occur in circuits containing only normal and antiferromagnetic (AFM) materials, and for the notion that antiferromagnets can play a role in STT phenomena in circuits containing both ferromagnetic and AFM elements. We review the experimental literature that provides partial evidence for these AFM spintronic effects but demonstrates that, like exchangebias effects, they are sensitive to details of interface structure that are not always under experimental control. Finally, we speculate briefly on some strategies that might advance progress.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Theoretical Concepts For Current-induced Torques In Antiferrmentioning

confidence: 99%

Antiferromagnetic metal spintronics

MacDonald

Tsoi

2011

Phil. Trans. R. Soc. A.

Self Cite

303

255

View full text Add to dashboard Cite

show abstract

“…(6). This approach has been applied with good success with ab-initio calculations of FN interfaces [30][31][32]67 .…”

Section: A Multiscale Approach To Spinmentioning

confidence: 99%

“…Many different approaches have been developed, ranging from purely quantum 16,17 to semi-classical Boltzmann equation [18][19][20] , (generalized) circuit theory [21][22][23][24][25][26][27] or Random Matrix Theory (RMT) 28,29 or full ab-initio (density functional theory) calculations [30][31][32][33] . A good understanding has now been reached of the respective domains of applicability and links between the various approaches 26,29 .…”

Section: Introductionmentioning

confidence: 99%

Multiscale approach to spin transport in magnetic multilayers

et al. 2011

View full text Add to dashboard Cite

This article discusses two dual approaches to spin transport in magnetic multilayers: a direct, purely quantum, approach based on a Tight-Binding model (TB) and a semiclassical approach (Continuous Random Matrix Theory, CRMT). The combination of both approaches provides a systematic way to perform multi-scales simulations of systems that contain relevant physics at scales larger (spin accumulation, spin diffusion...) and smaller (specular reflexions, tunneling...) than the elastic mean free paths of the layers. We show explicitly that CRMT and TB give consistent results in their common domain of applicability.

show abstract

“…It has been predicted theoretically that spin-transfer torque (STT) can act on AFM, causing reorientation of its spin configuration, domain wall motion and stable oscillation or precession of the Neel vector [18][19][20][21] . Several follow-up experiments on exchange-biased spin-valves [22][23][24][25] have shown that current induced STT is able to affect the exchange bias at the FM/AFM interface, indirectly suggesting the presence of STT effect in AFM.…”

Section: Introductionmentioning

confidence: 99%