Real-Time Measurement of Temporal Response of a Spin-Torque Oscillator to Magnetic Pulses
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概要
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A read head based on a spin-torque oscillator (STO) has been proposed for the high-density magnetic recording beyond 2 Tbit/in.2. To evaluate the stability and agility of the oscillation, we conduct a real-time measurement of the STO waveform under a magnetic pulse (${\sim}60$ Oe) in the nanosecond region, and estimate its instantaneous frequency. Stable oscillation is sustained in the presence of the magnetic pulse, and the frequency shift is clearly observed, indicating that the STO frequency responds to the change in magnetic field in less than 1 ns.
- Japan Society of Applied Physicsの論文
- 2011-01-25
著者
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KUDO Kiwamu
Corporate Research & Development Center, Toshiba Corporation
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NAGASAWA Tazumi
Corporate Research & Development Center, Toshiba Corporation
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MIZUSHIMA Koichi
Corporate Research & Development Center, Toshiba Corporation
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SUTO Hirofumi
Corporate Research & Development Center, Toshiba Corporation
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SATO Rie
Corporate Research & Development Center, Toshiba Corporation
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Mizushima Koichi
Corporate Research & Development Center Toshiba Corporation
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Sato Rie
Corporate Research & Development Center Toshiba Corporation
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Nagasawa Tazumi
Corporate Research & Development Center Toshiba Corporation
関連論文
- Numerical Simulation on Temporal Response of Spin-Torque Oscillator to Magnetic Pulses
- Synchronized Magnetization Oscillations in F/N/F Nanopillars (Selected Topics in Applied Physics(4)Magnetization Dynamics in Spintronic Structures and Devices)
- Amplitude noise in spin-torque oscillators
- 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