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Spin transfer torqu...
Spin transfer torque generated magnetic droplet solitons (invited)
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- Chung, Sunjae (author)
- KTH,Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg,Materialfysik, MF
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- Mohseni, Seyed Majid (author)
- KTH,Materialfysik, MF
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- Sani, Sohrab Redjai (author)
- KTH,Materialfysik, MF
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- Iacocca, Ezio, 1986 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Dumas, Randy K. (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Nguyen, Thi Ngooc Anh (author)
- KTH,Materialfysik, MF
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- Pogoryelov, Yevgen, 1975 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Muduli Kishor, Pranaba, 1978 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Eklund, Anders (author)
- KTH,Integrerade komponenter och kretsar
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Hoefer, M. (author)
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- Åkerman, Johan, 1970 (author)
- KTH,Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg,Materialfysik, MF
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- Pogoryelov, Ye. (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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(creator_code:org_t)
- AIP Publishing, 2014
- 2014
- English.
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In: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 115:17
- Related links:
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http://dx.doi.org/10...
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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https://research.cha...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- We present recent experimental and numerical advancements in the understanding of spin transfer torque generated magnetic droplet solitons. The experimental work focuses on nano-contact spin torque oscillators (NC-STOs) based on orthogonal (pseudo) spin valves where the Co fixed layer has an easy-plane anisotropy, and the [Co/Ni] free layer has a strong perpendicular magnetic anisotropy. The NC-STO resistance and microwave signal generation are measured simultaneously as a function of drive current and applied perpendicular magnetic field. Both exhibit dramatic transitions at a certain current dependent critical field value, where the microwave frequency drops 10 GHz, modulation sidebands appear, and the resistance exhibits a jump, while the magnetoresistance changes sign. We interpret these observations as the nucleation of a magnetic droplet soliton with a large fraction of its magnetization processing with an angle greater than 90 degrees, i.e., around a direction opposite that of the applied field. This interpretation is corroborated by numerical simulations. When the field is further increased, we find that the droplet eventually collapses under the pressure from the Zeeman energy. (C) 2014 AIP Publishing LLC.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- POLARIZED CURRENT
- NANO-OSCILLATORS
- ELECTRIC-CURRENT
- PHASE-LOCKING
- DRIVEN
- MODULATION
- MULTILAYER
- EXCITATION
- DEVICES
- EMISSION
- Physics
- Applied
- PHYSICS
- APPLIED
- MULTILAYER
- Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Chung, Sunjae
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Mohseni, Seyed M ...
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Sani, Sohrab Red ...
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Iacocca, Ezio, 1 ...
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Dumas, Randy K.
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Nguyen, Thi Ngoo ...
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Pogoryelov, Yevg ...
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Muduli Kishor, P ...
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Eklund, Anders
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Hoefer, M.
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Åkerman, Johan, ...
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Pogoryelov, Ye.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Journal of Appli ...
- By the university
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University of Gothenburg
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Chalmers University of Technology
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Uppsala University
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Royal Institute of Technology