Micromagnetic study of high-power spin-torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar under external magnetic fields

H. B. Huang, X. Q. Ma, C. P. Zhao, Z. H. Liu, L. Q. Chen

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We investigated the high-power spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi spin-valve nanopillars with perpendicular magnetization under external magnetic field using micromagnetic simulations. Our simulations show that the narrow optimum current of magnetization precession in the Heusler-based spin valve is broadened by introducing the surface anisotropy. The linear decrease of frequency with the out-of-plane magnetic field is obtained in our simulation. Additionally, the in-plane magnetic field dependence of frequency shows a parabolic curve which is explained by the magnetization trajectory tilting. Furthermore, we also discussed the decrease of output power using the excitation of non-uniform magnetization precession in the in-plane magnetic fields.

Original languageEnglish (US)
Pages (from-to)10-15
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume373
DOIs
StatePublished - Mar 1 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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