Effects of spin current on ferromagnets (invited)

Li, Z.; He, John; Zhang, S.

doi:10.1063/1.2166590

Cited by 27 publications

(15 citation statements)

References 29 publications

(41 reference statements)

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“…[9][10][11][12][13][14][15][16] On the other hand, since the appearance of the work by Berger [17][18][19] and Slonczewski,20,21 considerable effort has been put in understanding currentdriven DWM. 16,[22][23][24][25][26][27][28][29][30][31][32][33] Several works have experimentally analyzed the DWM driven by long static magnetic fields 13,15 and direct currents ͑dc͒. [34][35][36][37][38][39][40][41] For instance, the experimental measurements of the DW velocity carried by Atkinson et al 13 under static fields could be explained as the balance between local pinning force due to the surface roughness and thermal fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Domain-wall dynamics driven by short pulses along thin ferromagnetic strips: Micromagnetic simulations and analytical description

et al. 2009

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Micromagnetic simulations are used to describe the domain-wall dynamics along thin ferromagnetic strips driven by short pulses of magnetic field or electrical current with sinusoidal shape. For perfect strips without pinning centers, the net displacement of the domain wall is proportional both to the amplitude and the duration of the field pulse. A similar behavior is observed under current pulses if some nonadiabatic corrections are taken into account. On the contrary, the net displacement is null in the perfect adiabatic case. The domain-wall dynamics driven by these pulses is also characterized for strips which contain a single constriction, which acts as pinning site for the wall. The results reveal that an initially pinned domain wall can be eventually expelled far away from the constriction but if the maximum displacement does not surpass a given threshold the domain-wall experiences an attractive force which pushes it again toward the initial pinning site. Finally, the analysis of the domain wall jumps between two pinning sites is carried out both at zero and at room temperature for several separations between them. The simulations point out that the jumps can be achieved by means of short field or current pulses in the subnanosecond regime, an observation which could find application for a fast and easily controlled writing mechanism for future magnetic random access memory devices based on a pinned domain wall.

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Section: Introductionmentioning

confidence: 99%

Domain-wall dynamics driven by short pulses along thin ferromagnetic strips: Micromagnetic simulations and analytical description

et al. 2009

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“…Current-driven domain wall motion [1] in a nanowire has attracted much attention, and has been investigated studied both experimentally [2][3][4] and theoretically [5][6][7] in recent years. Parkin et al proposed the sequential access memory, which is so-called the magnetic race track memory, based on the currentdriven domain wall motion [8].…”

Section: Introductionmentioning

confidence: 99%

Influence of exchange coupling on current-driven domain wall motion in a nanowire

Komine¹,

Takahashi²,

Murakami³

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…S PIN-CURRENT-INDUCED domain wall motion in a nanowire has attracted much attention [1], [2], and new memory and logic devices with current-induced wall motion are suggested by some authors [3]. In order to control domain wall motion in memory devices with large capacity, magnetic wall pinning, such as a notch, is necessary [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Notch Shape and Size on Current-Driven Domain Wall Motions in a Magnetic Nanowire

et al. 2008

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In this study, the influence of triangle and rectangle notches with various sizes on current-induced domain wall motion has been investigated by utilizing micromagnetic simulation. Each notch plays a role in wall pinning, and the effect of wall pinning increases as the notch size increases. The phase diagram in a critical current density and a critical field for the notch shape is clarified. There are four modes in domain wall depinning by various current densities and magnetic fields.Index Terms-Current-induced domain wall motion, nanowire, notch, phase diagram.

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Effects of spin current on ferromagnets (invited)

Cited by 27 publications

References 29 publications

Domain-wall dynamics driven by short pulses along thin ferromagnetic strips: Micromagnetic simulations and analytical description

Domain-wall dynamics driven by short pulses along thin ferromagnetic strips: Micromagnetic simulations and analytical description

Influence of exchange coupling on current-driven domain wall motion in a nanowire

Influence of Notch Shape and Size on Current-Driven Domain Wall Motions in a Magnetic Nanowire

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