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Decoherence and Mod...
Decoherence and Mode Hopping in a Magnetic Tunnel Junction Based Spin Torque Oscillator
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- Muduli Kishor, Pranaba, 1978 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Heinonen, O. G. (författare)
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- Åkerman, Johan (författare)
- Gothenburg University,Göteborgs universitet,KTH,Materialfysik,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- 2012
- 2012
- Engelska.
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 108:20, s. 207203-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://gup.ub.gu.se...
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Abstract
Ämnesord
Stäng
- We discuss the coherence of magnetic oscillations in a magnetic tunnel junction based spin torque oscillator as a function of the external field angle. Time-frequency analysis shows mode hopping between distinct oscillator modes, which arises from linear and nonlinear couplings in the Landau-Lifshitz-Gilbert equation, analogous to mode hopping observed in semiconductor ring lasers. These couplings and, therefore, mode hopping are minimized near the current threshold for the antiparallel alignment of free-layer with reference layer magnetization. Away from the antiparallel alignment, mode hopping limits oscillator coherence.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Polarized Current
- Driven
- Multilayers
- Generation
- Emission
- polarized current
- driven
- multilayers
- generation
- emission
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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