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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Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction. / Zhang, Yisong; Zhao, Hui; Lyle, Andrew; Wang, Jianping.
In: Journal of Applied Physics, Vol. 109, No. 7, 07C714, 01.04.2011.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction
AU - Zhang, Yisong
AU - Zhao, Hui
AU - Lyle, Andrew
AU - Wang, Jianping
PY - 2011/4/1
Y1 - 2011/4/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79955454490&partnerID=8YFLogxK
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U2 - 10.1063/1.3554260
DO - 10.1063/1.3554260
M3 - Article
VL - 109
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 7
M1 - 07C714
ER -