Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry

被引：9

作者：

Kim, Woo-Yeong ^{[1
]}

Lee, Kyung-Jin ^{[1
,2
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea

[2] KU KIST Grad Sch Converging Sci & Technol, Seoul 136713, South Korea

来源：

CURRENT APPLIED PHYSICS | 2013年 / 13卷 / 05期

关键词：

Spin-torque nano-oscillator; Spin-transfer torque; Micromagnetics; TUNNEL-JUNCTIONS; VOLTAGE-DEPENDENCE; POLARIZED CURRENT; CO/CU/CO PILLARS; PHASE-LOCKING; WAVES; MULTILAYER; EXCITATION;

D O I：

10.1016/j.cap.2013.01.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show micromagnetic simulation results for spin-torque nano-oscillator (STNO) with point-contact geometry. Numerical results obtained from three different models are compared in order to investigate the effect of current-induced Oersted field and non-uniform current distribution on the characteristics of STNO. It is found that the Oersted field and non-uniform current distribution affect the frequency and precession mode both qualitatively and quantitatively. An anisotropic emission of spin-waves is observed only when considering the Oersted field properly. Our results suggest that a realistic consideration of the current distribution and consequent Oersted field distribution is of critical important to design STNOs and to understand the characteristics of STNOs. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：890 / 893

页数：4

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