Sökning: onr:"swepub:oai:DiVA.org:kth-234662" >
Magnetodynamics in ...
Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions
-
- Jiang, Sheng (författare)
- KTH,Material- och nanofysik
-
- Ahlberg, Martina (författare)
- Department of Physics, University of Gothenburg
-
- Afshin, Houshang (författare)
- Department of Physics, University of Gothenburg
-
visa fler...
-
- Ferreira, R. (författare)
- International Iberian Nanotechnology Laboratory (INL), Braga, Portugal
-
- Freitas, P. P. (författare)
- International Iberian Nanotechnology Laboratory (INL), Braga, Portugal
-
- Chung, Sunjae (författare)
- KTH,Tillämpad fysik
-
- Åkerman, Johan (författare)
- KTH,Material- och nanofysik,Department of Physics, University of Gothenburg
-
visa färre...
-
(creator_code:org_t)
- Engelska.
- Relaterad länk:
-
https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- We demonstrate the magnetodynamics of nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions, with a strong perpendicular magnetic anisotropy free layer and an easy-plane reference layer. First, the static magnetic properties are studied by conducting hysteresis loop and magnetoresistance measurements. Then, we characterize the generated microwave signals by applying dc currents. Field-sweep signals at xed current show a typical FMR-like frequency dependence. Interestingly, for current-sweep measurements, the plot of frequency versus dc current can be fitted well with a symmetric parabolic and an asymmetric linear term. The symmetric behavior is ascribed to the current-induced Joule heating and Oersted elds. The asymmetric dependence is due to the linear perpendicular spin torque (or eld-like torque) and the voltage-controlled magnetic anisotropy. Our observation hints at a route to improving the frequency tunability in future spintronic applications by selectively adding all these contributions.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Physics
- Fysik
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)