Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction

Yisong Zhang; Hui Zhao; Andrew Lyle; Jian Ping Wang

doi:10.1063/1.3554260

Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction

Yisong Zhang, Hui Zhao, Andrew Lyle, Jian Ping Wang

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

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	https://doi.org/10.1063/1.3554260
State	Published - Apr 1 2011

Bibliographical note

Funding Information:
This work was supported primarily by the MRSEC Program of the National Science Foundation under Award No. DMR-0819885. We thank Professor Paul Crowell, Mr. Te-Yu Chen, Dr. Jaesang Oh, Professor Anand Gopinath, and Professor Rhonda Franklin for their technical assistance with the microwave measurements and Professor Ilya Krivorotov from UC Irvine for his useful discussions.

Publisher link

10.1063/1.3554260

Find It

Find It at U of M Libraries

Cite this

@article{d07c658ab4a843a89040f7a6080712d1,

title = "Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction",

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.",

author = "Yisong Zhang and Hui Zhao and Andrew Lyle and Wang, {Jian Ping}",

note = "Funding Information: This work was supported primarily by the MRSEC Program of the National Science Foundation under Award No. DMR-0819885. We thank Professor Paul Crowell, Mr. Te-Yu Chen, Dr. Jaesang Oh, Professor Anand Gopinath, and Professor Rhonda Franklin for their technical assistance with the microwave measurements and Professor Ilya Krivorotov from UC Irvine for his useful discussions.",

year = "2011",

month = apr,

day = "1",

doi = "10.1063/1.3554260",

language = "English (US)",

volume = "109",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "7",

}

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, Jian Ping

N1 - Funding Information: This work was supported primarily by the MRSEC Program of the National Science Foundation under Award No. DMR-0819885. We thank Professor Paul Crowell, Mr. Te-Yu Chen, Dr. Jaesang Oh, Professor Anand Gopinath, and Professor Rhonda Franklin for their technical assistance with the microwave measurements and Professor Ilya Krivorotov from UC Irvine for his useful discussions.

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

UR - http://www.scopus.com/inward/citedby.url?scp=79955454490&partnerID=8YFLogxK

U2 - 10.1063/1.3554260

DO - 10.1063/1.3554260

M3 - Article

AN - SCOPUS:79955454490

VL - 109

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 7

M1 - 07C714

ER -

Power enhancement of angular polarizer spin torque oscillator in magnetic tunnel junction

Abstract

Bibliographical note

Publisher link

Find It

Other files and links

Fingerprint

Cite this