Spin transfer torque oscillator based on asymmetric magnetic tunnel junctions

  title={Spin transfer torque oscillator based on asymmetric magnetic tunnel junctions},
  author={Witold Skowro'nski and Tomasz Stobiecki and Jerzy Wrona and G{\"u}nter Reiss and Sebastiaan Dijken},
We present a study of the spin transfer torque oscillator based on CoFeB/MgO/CoFeB asymmetric magnetic tunnel junctions. We observe microwave precession in junctions with different thickness of the free magnetization layer. Taking advantage of the ferromagnetic interlayer exchange coupling between the free and reference layer in the MTJ and perpendicular interface anisotropy in thin CoFeB electrode we demonstrate the nanometer scale device that can generate high frequency signal without… 
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