Effects of spin current on ferromagnets (invited)

Z. Li; J. He; S. Zhang

doi:10.1063/1.2166590

Effects of spin current on ferromagnets (invited)

Z. Li, J. He, S. Zhang

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

When a spin-polarized current flows through a ferromagnet, the local magnetization receives a spin torque. Two consequences of this spin torque are studied. First, the uniformly magnetized ferromagnet becomes unstable if a sufficiently large current is applied. The characteristics of the instability include spin-wave generation and magnetization chaos. Second, the spin torque has profound effects on the structure and dynamics of the magnetic domain wall. A detailed analysis on the domain-wall mass, kinetic energy, and wall depinning threshold is given.

Original language	English (US)
Article number	08Q702
Journal	Journal of Applied Physics
Volume	99
Issue number	8
DOIs	https://doi.org/10.1063/1.2166590
State	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.2166590

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title = "Effects of spin current on ferromagnets (invited)",

abstract = "When a spin-polarized current flows through a ferromagnet, the local magnetization receives a spin torque. Two consequences of this spin torque are studied. First, the uniformly magnetized ferromagnet becomes unstable if a sufficiently large current is applied. The characteristics of the instability include spin-wave generation and magnetization chaos. Second, the spin torque has profound effects on the structure and dynamics of the magnetic domain wall. A detailed analysis on the domain-wall mass, kinetic energy, and wall depinning threshold is given.",

author = "Z. Li and J. He and S. Zhang",

note = "Funding Information: The research was supported by NSF (ECS-0223568 and DMR-0314456). FIG. 1. (a) Schematic pinning source in a Co nanowire. (b) The minimum spin current required for a wall propagation through a pinning as a function of pinning position x d . The parameters of Co are 4 π M s = 1.8 × 10 4 Oe , H K = 500 Oe , M s = 14.46 × 10 5 A ∕ m , A = 2.0 × 10 − 11 J ∕ m , H e = 0 , ζ = 0.02 , and α = 0.006 . ",

year = "2006",

doi = "10.1063/1.2166590",

language = "English (US)",

volume = "99",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Effects of spin current on ferromagnets (invited)

AU - Li, Z.

AU - He, J.

AU - Zhang, S.

N1 - Funding Information: The research was supported by NSF (ECS-0223568 and DMR-0314456). FIG. 1. (a) Schematic pinning source in a Co nanowire. (b) The minimum spin current required for a wall propagation through a pinning as a function of pinning position x d . The parameters of Co are 4 π M s = 1.8 × 10 4 Oe , H K = 500 Oe , M s = 14.46 × 10 5 A ∕ m , A = 2.0 × 10 − 11 J ∕ m , H e = 0 , ζ = 0.02 , and α = 0.006 .

PY - 2006

Y1 - 2006

N2 - When a spin-polarized current flows through a ferromagnet, the local magnetization receives a spin torque. Two consequences of this spin torque are studied. First, the uniformly magnetized ferromagnet becomes unstable if a sufficiently large current is applied. The characteristics of the instability include spin-wave generation and magnetization chaos. Second, the spin torque has profound effects on the structure and dynamics of the magnetic domain wall. A detailed analysis on the domain-wall mass, kinetic energy, and wall depinning threshold is given.

AB - When a spin-polarized current flows through a ferromagnet, the local magnetization receives a spin torque. Two consequences of this spin torque are studied. First, the uniformly magnetized ferromagnet becomes unstable if a sufficiently large current is applied. The characteristics of the instability include spin-wave generation and magnetization chaos. Second, the spin torque has profound effects on the structure and dynamics of the magnetic domain wall. A detailed analysis on the domain-wall mass, kinetic energy, and wall depinning threshold is given.

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JO - Journal of Applied Physics

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Effects of spin current on ferromagnets (invited)

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