Search: onr:"swepub:oai:gup.ub.gu.se/183370" >
Microwave Signal Ge...
Microwave Signal Generation in Single-Layer Nano-Contact Spin Torque Oscillators
-
Sani, S. R. (author)
-
- Dürrenfeld, Philipp (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
-
Mohseni, S.M. (author)
-
show more...
-
Chung, Sunjae, 1976 (author)
-
Åkerman, Johan, 1970 (author)
-
show less...
-
(creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2013
- 2013
- English.
-
In: Ieee Transactions on Magnetics. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9464 .- 1941-0069. ; 49:7, s. 4331-4334
- Related links:
-
https://gup.ub.gu.se...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- We demonstrate spin transfer torque (STT) driven microwave signal generation, from about 250 MHz to above 3 GHz, in single perm alloy layers underneath a nano-contact with diameter of 100 nm. The threshold current for signal generation is found to be strongly hysteretic, the microwave signal shows a number of harmonics, zero-field operation is straightforward, and the microwave frequency increases quasi-linearly with drive current. All observations are consistent with STT driven motion of a vortex-antivortex pair nucleated by the Oersted field underneath the nano-contact. While the generated power is about 10 dB smaller than the best GMR based nano-contact spin torque oscillators, the linewidth of 6-100 MHz is of the same order.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Single layer
- spin torque oscillator
- vortex
- POLARIZED CURRENT
- DRIVEN
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database