Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1788635 | Current Applied Physics | 2010 | 5 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
Chun-Yeol You,