Effect of Antiferromagnetic Interlayer Coupling on Current-Assisted Magnetization Switching

Details Effect of Antiferromagnetic Interlayer Coupling on Current-Assisted Magnetization Switching Effect of Antiferromagnetic Interlayer Coupling on Current-Assisted Magnetization Switching

2003-03-28

arxiv.org/abs/cond-mat/0303614v1

Physics

Condensed Matter

3 pages, 3 figures

Scientific paper

10.1063/1.1592311

We compare magnetization switching in Co/Cu/Co nanopillars with uncoupled and dipole-field coupled Co layers. In uncoupled nanopillars, current-driven switching is hysteretic at low magnetic field H and changes to reversible, characterized by telegraph noise, at high H. We show that dipolar coupling both affects the switching current and causes the switching to become reversible at small H. The coupling thus changes the switching to reversible, hysteretic, and then reversible again as H increases. We describe our results in terms of current-assisted thermal activation.

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