Synchronized Magnetization Oscillations in F/N/F Nanopillars

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概要

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• 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 magnetization. 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.

• 2006-05-15

著者

• KUDO Kiwamu

  Corporate Research & Development Center, Toshiba Corporation

• MIZUSHIMA Koichi

  Corporate Research & Development Center, Toshiba Corporation

• SATO Rie

  Corporate Research & Development Center, Toshiba Corporation

• Kudo Kiwamu

  Corporate Research and Development Center, Toshiba Corporation, Kawasaki 212-8582, Japan

• Mizushima Koichi

  Corporate Research and Development Center, Toshiba Corporation, Kawasaki 212-8582, Japan

関連論文

• Numerical Simulation on Temporal Response of Spin-Torque Oscillator to Magnetic Pulses
• Real-Time Measurement of Temporal Response of a Spin-Torque Oscillator to Magnetic Pulses
• Two-Dimensional Growth of AlN and GaN on Lattice-Relaxed Al_Ga_N Buffer Layers Prepared with High-Temperature-Grown AlN Buffer on Sapphire Substrates and Fabrication of Multiple-Quantum-Well Structures
• Amplitude Noise in Spin-Torque Oscillators
• Synchronized Magnetization Oscillations in F/N/F Nanopillars

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