Spin-torque oscillator with coupled out-of-plane oscillation layers for microwave-assisted magnetic recording: Experimental, analytical, and numerical studies

被引：7

作者：

Nakagawa, Yuji ^{[1
]}

Takagishi, Masayuki ^{[1
]}

Narita, Naoyuki ^{[1
]}

Nagasawa, Tazumi ^{[1
]}

Koizumi, Gaku ^{[2
]}

Chen, Wenyu ^{[3
]}

Kawasaki, Shohei ^{[3
]}

Roppongi, Tetsuya ^{[3
]}

Takeo, Akihiko ^{[2
]}

Maeda, Tomoyuki ^{[1
]}

机构：

[1] Toshiba Co Ltd, Corp Res & Dev Ctr, Kawasaki 2128582, Japan

[2] Toshiba Elect Devices & Storage Corp, Yokohama 2358522, Japan

[3] Headway Technol Inc, Milpitas, CA 95035 USA

来源：

APPLIED PHYSICS LETTERS | 2023年 / 122卷 / 04期

关键词：

PHASE-LOCKING; DRIVEN;

D O I：

10.1063/5.0133921

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spin-torque oscillators (STOs) are unique spintronic devices in which spin current induces the precession of magnetization in the oscillation layer. In this study, we demonstrate coupled out-of-plane oscillation between two oscillation layers within an STO. The coupled oscillation state is observed in the magnetoresistance spectra as well as its degradation due to the mixing of the free oscillation state depending on the bias current. These behaviors are analytically described and numerically reproduced based on the Landau-Lifshitz-Gilbert equation. Since the STO is fabricated in the write head of a hard disk drive, the coupled oscillation state and the subsequent microwave magnetic field are applicable for microwave-assisted magnetic recording for high-density recording.

引用

页数：5

共 39 条

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Zhou, W.
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APPLIED PHYSICS LETTERS, 2019, 114 (17)
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Igarashi, Masukazu
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IEEE TRANSACTIONS ON MAGNETICS, 2010, 46 (10) : 3738 - 3741
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Chan, Kheong Sann
Kanai, Yasushi
Itagaki, Ryo
Rahardja, Susanto
IEEE ACCESS, 2019, 7 : 140134 - 140141
[4] Effect of Spin-Torque Oscillator Tilt Angle in Microwave-Assisted Magnetic Recording
Greaves, Simon John
Kanai, Yasushi
IEEE TRANSACTIONS ON MAGNETICS, 2019, 55 (03)
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Prokopenko, O. V.
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JOURNAL OF APPLIED PHYSICS, 2012, 111 (12)
[6] Model Analysis of Tilted Spin-Torque Oscillator With Magnetic Write Head for Shingled Microwave-Assisted Magnetic Recording
Katayama, Takuto
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Muraoka, Hiroaki
IEEE TRANSACTIONS ON MAGNETICS, 2014, 50 (11)
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Zhu, Jian-Gang
IEEE TRANSACTIONS ON MAGNETICS, 2019, 55 (12)
[8] Micromagnetic Model Simulation of Spin-Torque Oscillator and Write Head for Microwave-Assisted Magnetic Recording - Spin Injection Layer with In-Plane Anisotropy -
Kanai, Yasushi
Itagaki, Ryo
Greaves, Simon
Muraoka, Hiroaki
2018 INTERNATIONAL APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY SYMPOSIUM (ACES), 2018,
[9] Micromagnetic Model Simulation of Spin-Torque Oscillator and Write Head for Microwave-Assisted Magnetic Recording - Spin Injection Layer with In-Plane Anisotropy -
Kanai, Yasushi
Itagaki, Ryo
Greaves, Simon
Muraoka, Hiroaki
APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL, 2019, 34 (02): : 226 - 227
[10] Optimization of Microwave-Assisted Magnetic Recording Media for Spin-Torque Oscillators With Dual Field Generating Layers
Greaves, Simon John
Kanai, Yasushi
IEEE TRANSACTIONS ON MAGNETICS, 2025, 61 (04)

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