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Dependence of the c...
Dependence of the colored frequency noise in spin torque oscillators on current and magnetic field
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- Eklund, Anders (author)
- KTH,Integrerade komponenter och kretsar
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- Bonetti, Stefano (author)
- KTH,Materialfysik, MF
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- Sani, Sohrab R. (author)
- KTH,Materialfysik, MF
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- Mohseni, Seyed Majid (author)
- KTH,Materialfysik, MF
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Persson, Johan (author)
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- Chung, Sunjae (author)
- KTH,Materialfysik, MF
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- Banuazizi, S. Amir Hossein (author)
- KTH,Material- och nanofysik
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- Iacocca, Ezio, 1986 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Östling, Mikael (author)
- KTH,Integrerade komponenter och kretsar
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- Åkerman, Johan (author)
- Gothenburg University,KTH,Materialfysik, MF,Göteborgs universitet,University of Gothenburg,Institutionen för fysik (GU),Department of Physics (GU)
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- Malm, B. Gunnar (author)
- KTH,Integrerade komponenter och kretsar
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(creator_code:org_t)
- AIP Publishing, 2014
- 2014
- English.
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In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 104:9, s. 092405-
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http://dx.doi.org/10...
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Abstract
Subject headings
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- The nano-scale spin torque oscillator (STO) is a compelling device for on-chip, highly tunable microwave frequency signal generation. Currently, one of the most important challenges for the STO is to increase its longer-time frequency stability by decreasing the 1/f frequency noise, but its high level makes even its measurement impossible using the phase noise mode of spectrum analyzers. Here, we present a custom made time-domain measurement system with 150MHz measurement bandwidth making possible the investigation of the variation of the 1/f as well as the white frequency noise in a STO over a large set of operating points covering 18-25GHz. The 1/f level is found to be highly dependent on the oscillation amplitude-frequency non-linearity and the vicinity of unexcited oscillation modes. These findings elucidate the need for a quantitative theoretical treatment of the low-frequency, colored frequency noise in STOs. Based on the results, we suggest that the 1/f frequency noise possibly can be decreased by improving the microstructural quality of the metallic thin films.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Amplitude-frequency
- Measurement bandwidth
- Metallic thin films
- Spin-torque oscillator (STO)
- Spin-torque oscillators
- Theoretical treatments
- Time domain measurement
- Tunable microwave
- NANO-OSCILLATORS
- WAVES
- EXCITATION
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Eklund, Anders
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Bonetti, Stefano
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Sani, Sohrab R.
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Mohseni, Seyed M ...
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Persson, Johan
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Chung, Sunjae
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show more...
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Banuazizi, S. Am ...
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Iacocca, Ezio, 1 ...
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Östling, Mikael
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Åkerman, Johan
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Malm, B. Gunnar
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Applied Physics ...
- By the university
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Royal Institute of Technology
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Chalmers University of Technology
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University of Gothenburg