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Open Access Publications from the University of California

Spin torque driven magnetization dynamics in nanoscale magnetic tunnel junctions

  • Author(s): Sha, Chengcen
  • Advisor(s): Krivorotov, Ilya
  • et al.
Creative Commons Attribution-ShareAlike 4.0 International Public License

This master thesis demonstrates our investigation on spin torque driven magnetization dynamics in nanoscale magnetic tunnel junctions. We develop field-modulation spin-torque ferromagnetic resonance to characterize magnetic anisotropy and magnetic damping in nanomagnets. Then we demonstrate a single-shot electrical technique to capture the magnetic dynamics during the spin-torque-induced switching. By improving the sensitivity, we can directly observe real-time oscillation before switching. Lastly, we focus on measurement of switching probability of magnetic tunnel junctions by applying electric pulses. We observe anomalous write error rate behavior in our magnetic tunnel junctions samples. Possible origins of this anomalous write error rate has been discussed.

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