Search: onr:"swepub:oai:gup.ub.gu.se/255757" >
Time-domain stabili...
Time-domain stability of parametric synchronization in a spin-torque nano-oscillator based on a magnetic tunnel junction
-
Sharma, R. (author)
-
Sisodia, N. (author)
-
- Dürrenfeld, Philipp (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
-
show more...
-
- Åkerman, Johan, 1970 (author)
- KTH,Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Material- och nanofysik,Univ Gothenburg, Sweden
-
Muduli, P. K. (author)
-
show less...
-
(creator_code:org_t)
- American Physical Society, 2017
- 2017
- English.
-
In: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969. ; 96:2
- Related links:
-
https://gup.ub.gu.se...
-
show more...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- We report on time-domain stability of the parametric synchronization in a spin-torque nano-oscillator (STNO) based on a magnetic tunnel junction. Time-domain measurements of the instantaneous frequency (f(i)) of a parametrically synchronized STNO showrandom short-term unlocking of the STNO signal for low injected radio-frequency (RF) power, which cannot be revealed in time-averaged frequency domain measurements. Macrospin simulations reproduce the experimental results and reveal that the random unlocking during synchronization is driven by thermal fluctuations. We show that by using a high injected RF power, random unlocking of the STNO can be avoided. However, a perfect synchronization characterized by complete suppression of phase noise, so-called phase noise squeezing, can be obtained only at a significantly higher RF power. Our macrospin simulations suggest that a lower temperature and a higher positive ratio of the fieldlike torque to the spin transfer torque reduce the threshold RF power required for phase noise squeezing under parametric synchronization.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- phase-locking
- driven
- modulation
- emission
- devices
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database