Interlayer-Exchange-Dominant Spin Hall Nano-Oscillator

被引：0

作者：

Li, Rongxin ^{[1
]}

Yuan, Xiaojuan ^{[1
]}

Zhang, Zhenhua ^{[2
]}

Chen, Qian ^{[3
]}

Zeng, Zhongming ^{[3
]}

Lu, Zhihong ^{[1
]}

Wang, Ke ^{[4
]}

Liu, Yong ^{[1
]}

Xiong, Rui ^{[1
]}

机构：

[1] Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro & Nanostruct, Minist Educ, Wuhan 430072, Peoples R China

[2] Wuhan Univ Sci & Technol, Sch Mat & Met, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[3] Suzhou Inst Nanotech & Nanob, Key Lab Multifunct Nanomat & Smart Syst, CAS, Suzhou 215123, Jiangsu, Peoples R China

[4] East China Univ Technol, Sch Mech & Elect Engn, Nanchang 330013, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2023年 / 19卷 / 03期

关键词：

Exchange interactions - Iron compounds - Magnetic anisotropy - Microwave oscillators - Nickel compounds - Platinum compounds;

D O I：

10.1103/PhysRevApplied.19.034020

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The spin Hall nano-oscillator (SHNO) is a promising spintronic device to produce high-frequency and low-linewidth microwave signals. We study a type of SHNO based on the L10-FePt/NiFe/Pt exchange-spring system with an ultrahigh perpendicular magnetic anisotropy by micromagnetic simulation. The hard-soft magnetic exchange-spring system has a very high interlayer-exchange-interaction field, result-ing in a more than 30-GHz emission frequency and 38.6-GHz/T field tunability. Apart from conventional localized and nonlocalized auto-oscillation modes, localized or nonlocalized modes with central antisym-metry also appear in this SHNO. Two oscillation centers possess nonequal amplitudes and opposite phases in these antisymmetrical modes. Different modes are determined by the competition between three fac-tors: the exchange-interaction field, the perpendicular anisotropic field, and spin-orbit torque. The spin dynamics in the SHNO exhibit complex field and current dependence. Our results provide a possible direction for the design of SHNOs, which may be beneficial for the research and development of spintronic nano-oscillators.

引用

页数：9

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