Abstract
The power angular dependence for spin torque oscillators (STOs) is systematically investigated in magnetic tunnel junctions by varying the in-plane polarizer angle (IPPA) which refers to the angle between the free and fixed layer. The polarizer angle is adjusted by integrating a lithography process and a post-annealing process. An increase of power with increasing IPPA is experimentally demonstrated. STOs with a 30 and 60 IPPA show a 2-3 and 5-6 times higher efficiency in the power spectral density of the main peak than that with the traditional 0 IPPA, respectively. This increase of the power efficiency with IPPA for STOs can be explained by the power dependence on the precession angle at different IPPA.
| Original language | English (US) |
|---|---|
| Article number | 07C714 |
| Journal | Journal of Applied Physics |
| Volume | 109 |
| Issue number | 7 |
| DOIs | |
| State | Published - Apr 1 2011 |
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Zhang, Y., Zhao, H., Lyle, A., & Wang, J. (2011). Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction. Journal of Applied Physics, 109(7), [07C714]. https://doi.org/10.1063/1.3554260