Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry
Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry
- 주제(키워드) Spin-torque nano-oscillator , Spin-transfer torque , Micromagnetics
- 발행기관 한국물리학회
- 발행년도 2013
- 총서유형 Journal
- UCI G704-001115.2013.13.5.010
- KCI ID ART001790771
- 본문언어 영어
초록/요약
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 spinwaves 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.
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