Linear Frequency Modulation by Weak Bipolar Magnetic Fields for a Vortex-Mode Oscillation in a Nanocontact Magnetoresistive Spin-Torque-Oscillator
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概要
- 論文の詳細を見る
Spin torque oscillations near zero magnetic fields were investigated in a nanocontact magnetoresistive device. A typical auto-oscillation mode was observed with high amplitude and narrow linewidth in a vortex domain state of the free layer around the zero field. The number of branches was reduced to a single one with an increase of current over the threshold value. As a result, we observed a linear frequency change between a wider field range across zero fields with a high amplitude and a narrow linewidth for the oscillation. The frequency response to small bipolar applied fields is applicable to a weak-field sensor.
- The Japan Society of Applied Physicsの論文
- 2013-11-25
著者
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Imamura Hiroshi
National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
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Tsukahara Hiroshi
National Institute of Advanced Industrial Science and Technology (AIST), Nanosystem Research Institute, Tsukuba, Ibaraki 305-8568, Japan
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Miyake Kousaku
Electronic Engineering Department, Tohoku University, Sendai 980-8579, Japan
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Okutomi Yoshihito
Electronic Engineering Department, Tohoku University, Sendai 980-8579, Japan
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Sahashi Masashi
Electronic Engineering Department, Tohoku University, Sendai 980-8579, Japan
関連論文
- Effect of MgO Cap Layer on Gilbert Damping of FeB Electrode Layer in MgO-Based Magnetic Tunnel Junctions
- Critical Field of Spin Torque Oscillator with Perpendicularly Magnetized Free Layer
- Linear Frequency Modulation by Weak Bipolar Magnetic Fields for a Vortex-Mode Oscillation in a Nanocontact Magnetoresistive Spin-Torque-Oscillator
- Linear Frequency Modulation by Weak Bipolar Magnetic Fields for a Vortex-Mode Oscillation in a Nanocontact Magnetoresistive Spin-Torque-Oscillator
- Effect of MgO Cap Layer on Gilbert Damping of FeB Electrode Layer in MgO-Based Magnetic Tunnel Junctions