Abstract
The asymmetric magnetoresistance (MR) in Py/Pt bilayers is investigated. It increases linearly with respect to the current density up to a threshold and increases more rapidly above this threshold. To reveal the origin of the threshold behavior, we investigate the magnetic field dependence of the asymmetric MR. It is found that the magnetic field strongly suppresses the asymmetric MR only above the threshold current density. Micromagnetic simulation reveals that the reduction of magnetization due to the spin-torque oscillation can be the origin of the threshold behavior of the asymmetric MR.
| Original language | English |
|---|---|
| Article number | 073001 |
| Journal | Applied Physics Express |
| Volume | 10 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2017 Jul 1 |
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
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Li, T., Kim, S., Lee, S. J., Lee, S. W., Koyama, T., Chiba, D., Moriyama, T., Lee, K. J., Kim, K. J., & Ono, T. (2017). Origin of threshold current density for asymmetric magnetoresistance in Pt/Py bilayers. Applied Physics Express, 10(7), [073001]. https://doi.org/10.7567/APEX.10.073001