Effect of Spin Current on Uniform Ferromagnetism: Domain Nucleation

Details Effect of Spin Current on Uniform Ferromagnetism: Domain Nucleation Effect of Spin Current on Uniform Ferromagnetism: Domain Nucleation

2004-07-06

arxiv.org/abs/cond-mat/0407116v2

Phys. Rev. Lett. 94, 076601 (2005).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure, REVTeX, rivised version, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.94.076601

Large spin current applied to a uniform ferromagnet leads to a spin-wave instability as pointed out recently. In this paper, it is shown that such spin-wave instability is absent in a state containing a domain wall, which indicates that nucleation of magnetic domains occurs above a certain critical spin current. This scenario is supported also by an explicit energy comparison of the two states under spin current.

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