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Magnetodynamics in ...
Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions
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- Jiang, Sheng (författare)
- KTH,Tillämpad fysik,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden.
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- Ahlberg, Martina (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden.
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- Chung, Sunjae (författare)
- KTH,Tillämpad fysik,Korea Natl Univ Educ, Dept Phys Educ, Cheongju 28173, South Korea.
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- Houshang, Afshin (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden.;NanOsc AB, S-16440 Kista, Sweden.
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- Ferreira, R. (författare)
- Int Iberian Nanotechnol Lab INL, Av Mestre Jose Veiga S-N, P-4715330 Braga, Portugal.
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- Freitas, P. P. (författare)
- Int Iberian Nanotechnol Lab INL, Av Mestre Jose Veiga S-N, P-4715330 Braga, Portugal.
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- Åkerman, Johan, 1970 (författare)
- KTH,Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Tillämpad fysik,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden.;NanOsc AB, S-16440 Kista, Sweden.
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(creator_code:org_t)
- AIP Publishing, 2019
- 2019
- Engelska.
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 115:15
- Relaterad länk:
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http://arxiv.org/pdf...
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We demonstrate field and current controlled magnetodynamics in nanocontact spin-torque nano-oscillators based on orthogonal magnetic tunnel junctions. We systematically analyze the microwave properties (frequency f, linewidth Delta f, power P, and frequency tunability df/dI) with their physical origins-perpendicular magnetic anisotropy, dampinglike and fieldlike spin transfer torque (STT), and voltage-controlled magnetic anisotropy (VCMA). These devices present several advantageous characteristics: high emission frequencies (f>20 GHz), high frequency tunability (df/dI=0.25 GHz/mA), and zero-field operation (f similar to 4 GHz). Furthermore, detailed investigation of f(H, I) reveals that df/dI is mostly governed by the large VCMA [287 fJ/(V m)], while STT plays a negligible role.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- ferromagnetic-resonance
- large magnetoresistance
- phase-locking
- driven
- temperature
- generation
- dependence
- power
- Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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