Synchronized Magnetization Oscillations in F/N/F Nanopillars
arXiv:cond-mat/0511095 · doi:10.1143/JJAP.45.3869
Abstract
Current-induced magnetization dynamics in a trilayer structure composed of two ferromagnetic free layers and a nonmagnetic spacer is examined. Both free layers are treated as a monodomain magnetic body with an uniform agnetization. The dynamics of the two magnetizations is modeled by modified Landau-Lifshitz-Gilbert equations with spin-transfer torque terms. By solving the equations simultaneously, we discuss their various solutions in detail. We show that there exists the synchronous motion of two magnetizations among the various solutions; the magnetizations are resonantly coupled via spin-transfer torques and perform precessional motions with the same period. The condition to excite the synchronous motion depends on the difference between the intrinsic frequencies of the two ferromagnetic free layers as well as the magnitude of current.
arXiv comment7 pages, 13 figures, submitted to Japanese Journal of Applied Physics
References in corpus (9)
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
- Direct-Current Induced Dynamics in Co90Fe10/Ni80Fe20 Point Contacts
- Magnetization dynamics with a spin-transfer torque
- Current-Driven Magnetic Excitations in Permalloy-Based Multilayer Nanopillars
- Macrospin Models of Spin Transfer Dynamics
- Current Induced Magnetization Switching in Small Domains of Different Anisotropies
- Spin-Transfer Excitations of Permalloy Nanopillars for Large Applied Currents
- Magnetization self-organization in a single-domain ferromagnet subject to a spin current
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