Magnetic dynamics of quasi-Antiferromagnetic layer fabricated by 90° magnetic coupling

Shuu Horiike; Gen Nagashima; Yuichiro Kurokawa; Yongshi Zhong; Kazuto Yamanoi; Terumitsu Tanaka; Kimihide Matsuyama; Hiromi Yuasa

doi:10.7567/1347-4065/ab5d62

Magnetic dynamics of quasi-Antiferromagnetic layer fabricated by 90° magnetic coupling

Shuu Horiike, Gen Nagashima, Yuichiro Kurokawa, Yongshi Zhong, Kazuto Yamanoi, Terumitsu Tanaka, Kimihide Matsuyama, Hiromi Yuasa

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

In this study, we fabricated quasi-Antiferromagnetic (AFM) layers and investigated the magnetic dynamics of quasi-AFM in both an experiment and simulation. Quasi-AFM has multi domains with alternating antiparallel magnetization, which can be realized by using 90° magnetic coupling between two ferromagnetic layers. In magnetic resonance measurement, a frequency and damping constant of CoFe-based quasi-AFM are higher than those of conventional CoFe. Likewise, in micromagnetic simulation, we obtained the spin torque oscillation in Quasi-AFM with high frequency. This suggests the possibility of a novel material with the high frequency wave generator without a stray field, like antiferromagnetic materials.

Original language	English
Article number	SGGI02
Journal	Japanese journal of applied physics
Volume	59
Issue number	SG
DOIs	https://doi.org/10.7567/1347-4065/ab5d62
Publication status	Published - 2020 Apr 1
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.7567/1347-4065/ab5d62

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title = "Magnetic dynamics of quasi-Antiferromagnetic layer fabricated by 90° magnetic coupling",

abstract = "In this study, we fabricated quasi-Antiferromagnetic (AFM) layers and investigated the magnetic dynamics of quasi-AFM in both an experiment and simulation. Quasi-AFM has multi domains with alternating antiparallel magnetization, which can be realized by using 90° magnetic coupling between two ferromagnetic layers. In magnetic resonance measurement, a frequency and damping constant of CoFe-based quasi-AFM are higher than those of conventional CoFe. Likewise, in micromagnetic simulation, we obtained the spin torque oscillation in Quasi-AFM with high frequency. This suggests the possibility of a novel material with the high frequency wave generator without a stray field, like antiferromagnetic materials.",

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T1 - Magnetic dynamics of quasi-Antiferromagnetic layer fabricated by 90° magnetic coupling

AU - Horiike, Shuu

AU - Nagashima, Gen

AU - Kurokawa, Yuichiro

AU - Zhong, Yongshi

AU - Yamanoi, Kazuto

AU - Tanaka, Terumitsu

AU - Matsuyama, Kimihide

AU - Yuasa, Hiromi

PY - 2020/4/1

Y1 - 2020/4/1

N2 - In this study, we fabricated quasi-Antiferromagnetic (AFM) layers and investigated the magnetic dynamics of quasi-AFM in both an experiment and simulation. Quasi-AFM has multi domains with alternating antiparallel magnetization, which can be realized by using 90° magnetic coupling between two ferromagnetic layers. In magnetic resonance measurement, a frequency and damping constant of CoFe-based quasi-AFM are higher than those of conventional CoFe. Likewise, in micromagnetic simulation, we obtained the spin torque oscillation in Quasi-AFM with high frequency. This suggests the possibility of a novel material with the high frequency wave generator without a stray field, like antiferromagnetic materials.

AB - In this study, we fabricated quasi-Antiferromagnetic (AFM) layers and investigated the magnetic dynamics of quasi-AFM in both an experiment and simulation. Quasi-AFM has multi domains with alternating antiparallel magnetization, which can be realized by using 90° magnetic coupling between two ferromagnetic layers. In magnetic resonance measurement, a frequency and damping constant of CoFe-based quasi-AFM are higher than those of conventional CoFe. Likewise, in micromagnetic simulation, we obtained the spin torque oscillation in Quasi-AFM with high frequency. This suggests the possibility of a novel material with the high frequency wave generator without a stray field, like antiferromagnetic materials.

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Magnetic dynamics of quasi-Antiferromagnetic layer fabricated by 90° magnetic coupling

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