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Magnetic droplet so...
Magnetic droplet solitons in all-perpendicular nano-contact spin torque oscillators
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- Chung, Sunjae (author)
- KTH,Materialfysik, MF,Univ Gothenburg, Sweden
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- Le, Quang Tuan, 1976- (author)
- KTH,Materialfysik, MF,Applied Spintronics
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- Ahlberg, Martina (author)
- Department of Physics, University of Gothenburg
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- Awad, Ahmad A. (author)
- Department of Physics, University of Gothenburg
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- Mazraati, Hamid (author)
- KTH,Materialfysik, MF,NanOsc AB
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- Houshang, Afshin (author)
- Department of Physics, University of Gothenburg
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- Jiang, Sheng (author)
- KTH,Materialfysik, MF
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- Nguyen, Thi Ngoc Anh (author)
- KTH,Materialfysik, MF,Institute of Materials Science, Vietnam Academy of Science and Technology
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- Dumas, Randy K. (author)
- Department of Physics, University of Gothenburg
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- Åkerman, Johan (author)
- KTH,Materialfysik, MF,Univ Gothenburg, Sweden; NanOsc AB, Sweden
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Spin-torque-generated magnetic droplets are nontopological solitons that have both dynamic and static characteristics. Although theoretical studies of these droplets originally dealt with an all-perpendicular magnetic system, all experimental demonstrations have so far relied on orthogonal spin valve structures that require a rather strong magnetic field to nucleate the droplet. Here, for the first time, we show the nucleation and sustained operation of magnetic droplets under a low magnetic field using nanocontact spin-torque oscillators (NC-STO), both the free Co/Ni and fixed Co/Pd multilayers of which have strong perpendicular magnetic anisotropy. Droplet nucleation is observed as a change in the NC-STO resistance and the appearance of significant broadband microwave signal generation below 1 GHz. We also observe another important phenomenon in which the nucleated magnetic droplet can transform into a skyrmionic nanobubble in the low-field regime. Both magnetic droplet solitons and skyrmionic nanobubbles have been studied in detail using micromagnetic simulation.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- Physics
- Fysik
- Materials Science and Engineering
- Teknisk materialvetenskap
Publication and Content Type
- pop (subject category)
- ovr (subject category)
To the university's database
- By the author/editor
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Chung, Sunjae
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Le, Quang Tuan, ...
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Ahlberg, Martina
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Awad, Ahmad A.
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Mazraati, Hamid
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Houshang, Afshin
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show more...
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Jiang, Sheng
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Nguyen, Thi Ngoc ...
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Dumas, Randy K.
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Åkerman, Johan
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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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and Condensed Matter ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
- By the university
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Royal Institute of Technology