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Mode-hopping mechan...
Mode-hopping mechanism generating colored noise in a magnetic tunnel junction based spin torque oscillator
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Sharma, Raghav (author)
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- Durrenfeld, P. (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Iacocca, Ezio, 1986 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Heinonen, O. G. (author)
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- Åkerman, Johan (author)
- Gothenburg University,KTH,Materialfysik, MF,Univ Gothenburg, Sweden,Göteborgs universitet,University of Gothenburg,Institutionen för fysik (GU),Department of Physics (GU)
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- Muduli Kishor, Pranaba, 1978 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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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. ; 105:13, s. 132404-
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Abstract
Subject headings
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- The frequency noise spectrum of a magnetic tunnel junction based spin torque oscillator is examined where multiple modes and mode-hopping events are observed. The frequency noise spectrum is found to consist of both white noise and 1/f frequency noise. We find a systematic and similar dependence of both white noise and 1/f frequency noise on bias current and the relative angle between the reference and free layers, which changes the effective damping and hence the mode-hopping behavior in this system. The frequency at which the 1/f frequency noise changes to white noise increases as the free layer is aligned away from the anti-parallel orientation w.r.t the reference layer. These results indicate that the origin of 1/f frequency noise is related to mode-hopping, which produces both white noise as well as 1/f frequency noise similar to the case of ring lasers.
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
- Colored noise
- Magnetic tunnel junction
- Mode-hopping
- Spin-torque oscillators
- MODULATION
- Physics
- Applied
Publication and Content Type
- ref (subject category)
- art (subject category)
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