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

Woo Yeong Kim, Kyoung Jin Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)890-893
Number of pages4
JournalCurrent Applied Physics
Volume13
Issue number5
DOIs
Publication statusPublished - 2013 Jul

Bibliographical note

Funding Information:
This work was supported by the NRF ( 2010-0023798 , 2011-0028163 ), by the MEST Pioneer Research Center Program ( 2011-0027905 ), and KU-KIST School Joint Research Program.

Keywords

  • Micromagnetics
  • Spin-torque nano-oscillator
  • Spin-transfer torque

ASJC Scopus subject areas

  • General Materials Science
  • General Physics and Astronomy

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