Stable oscillation in spin torque oscillator excited by a small in-plane magnetic field

被引：9

作者：

Taniguchi, Tomohiro ^{[1
]}

Ito, Takahiro ^{[2
]}

Utsumi, Yasuhiro ^{[2
]}

Tsunegi, Sumito ^{[1
]}

Kubota, Hitoshi ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Spintron Res Ctr, Tsukuba, Ibaraki 3058568, Japan

[2] Mie Univ, Fac Engn, Tsu, Mie 5148507, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 05期

关键词：

TUNNEL-JUNCTIONS; POLARIZED CURRENT; PERPENDICULAR-ANISOTROPY; MICROWAVE GENERATION; DRIVEN; EMISSION; FILMS;

D O I：

10.1063/1.4927621

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Theoretical conditions to excite self-oscillation in a spin torque oscillator consisting of a perpendicularly magnetized free layer and an in-plane magnetized pinned layer are investigated by analytically solving the Landau-Lifshitz-Gilbert equation. The analytical relation between the current and oscillation frequency is derived. It is found that a large amplitude oscillation can be excited by applying a small field pointing to the direction anti-parallel to the magnetization of the pinned layer. The validity of the analytical results is confirmed by comparing with numerical simulation, showing good agreement especially in a low current region. (C) 2015 AIP Publishing LLC.

引用

页数：7

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