Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar

H. B. Huang, X. Q. Ma, Z. H. Liu, C. P. Zhao, Long-qing Chen

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We investigated the spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi (CMS) spin-valve nanopillar using micromagnetic simulations. Although it is known that the out-of-plane precession (OPP) usually has a larger power output than the in-plane precession (IPP), only IPP mode was experimentally observed in CMS. Our simulations revealed the fundamental and second harmonic radio frequency (rf) oscillations of the IPP mode, consistent with the experimental measurements in CMS-based pillars. Our simulations predicted that the OPP mode can be obtained under the condition of an initially antiparallel state, a small external magnetic field, and a sufficiently large current density.

Original languageEnglish (US)
Article number032132
JournalAIP Advances
Volume3
Issue number3
DOIs
StatePublished - Apr 10 2013

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precession
torque
oscillators
simulation
radio frequencies
current density
harmonics
oscillations
output
magnetic fields

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar",
abstract = "We investigated the spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi (CMS) spin-valve nanopillar using micromagnetic simulations. Although it is known that the out-of-plane precession (OPP) usually has a larger power output than the in-plane precession (IPP), only IPP mode was experimentally observed in CMS. Our simulations revealed the fundamental and second harmonic radio frequency (rf) oscillations of the IPP mode, consistent with the experimental measurements in CMS-based pillars. Our simulations predicted that the OPP mode can be obtained under the condition of an initially antiparallel state, a small external magnetic field, and a sufficiently large current density.",
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Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar. / Huang, H. B.; Ma, X. Q.; Liu, Z. H.; Zhao, C. P.; Chen, Long-qing.

In: AIP Advances, Vol. 3, No. 3, 032132, 10.04.2013.

Research output: Contribution to journalArticle

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T1 - Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar

AU - Huang, H. B.

AU - Ma, X. Q.

AU - Liu, Z. H.

AU - Zhao, C. P.

AU - Chen, Long-qing

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