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 journalArticle

5 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 1

Fingerprint

Induced currents
Point contacts
current distribution
torque
Magnetization
Torque
oscillators
Magnetic fields
magnetization
Spin waves
Geometry
geometry
magnetic fields
precession
magnons
simulation

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry. / Kim, Woo Yeong; Lee, Kyoung Jin.

In: Current Applied Physics, Vol. 13, No. 5, 01.07.2013, p. 890-893.

Research output: Contribution to journalArticle

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