publication . Article . Preprint . 2009

Critical current density for spin transfer torque switching with composite free layer structure

Chun-Yeol You;
Open Access
  • Published: 15 Sep 2009 Journal: Current Applied Physics, volume 10, pages 952-956 (issn: 1567-1739, Copyright policy)
  • Publisher: Elsevier BV
Critical current density of composite free layer (CFL) in magnetic tunneling junction is investigated. CFL consists of two exchange coupled ferromagnetic layers, where the coupling is parallel or anti-parallel. Instability condition of the CFL under the spin transfer torque, which is related with critical current density, is obtained by analytic spin wave excitation model and confirmed by macro-spin Landau-Lifshitz-Gilbert equation. The critical current densities for the coupled two identical layers are investigated with various coupling strengths, and spin transfer torque efficiencies.
free text keywords: General Physics and Astronomy, General Materials Science, Condensed Matter - Materials Science, Condensed Matter - Other Condensed Matter
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