2008/06/30 by Tomohiro Taniguchi, Hiroshi Imamura
Materials Science · Physics and Astronomy · #Condensed matter physics #Current (fluid) #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Spin diffusion #Spin-transfer torque #Thermodynamics #Torque #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.78.224421
published as Phys. Rev. B 78, 224421 (2008) · 6 pages, 3 figures
arxiv created 2008/12/31 · openalex publication_date 2008/12/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The critical current of the spin-transfer-torque-driven magnetization dynamics was studied by taking into account both spin pumping and the finite penetration depth of the transverse spin current. We successfully reproduced the recent experimental results obtained by Chen et al. [Phys. Rev. B 74, 144408 (2006)] and found that the critical current remains finite even in the zero-thickness limit of the free layer. We showed that the remaining value of the critical current is determined mainly by spin pumping. We also showed that we could control the critical current by varying the spin-diffusion length of the nonmagnetic electrode adjacent to the free layer.