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Magnetic droplet so...
Magnetic droplet solitons in all-perpendicular nano-contact spin torque oscillators
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- Chung, Sunjae (författare)
- KTH,Materialfysik, MF,Univ Gothenburg, Sweden
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- Le, Quang Tuan, 1976- (författare)
- KTH,Materialfysik, MF,Applied Spintronics
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- Ahlberg, Martina (författare)
- Department of Physics, University of Gothenburg
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- Awad, Ahmad A. (författare)
- Department of Physics, University of Gothenburg
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- Mazraati, Hamid (författare)
- KTH,Materialfysik, MF,NanOsc AB
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- Houshang, Afshin (författare)
- Department of Physics, University of Gothenburg
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- Jiang, Sheng (författare)
- KTH,Materialfysik, MF
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- Nguyen, Thi Ngoc Anh (författare)
- KTH,Materialfysik, MF,Institute of Materials Science, Vietnam Academy of Science and Technology
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- Dumas, Randy K. (författare)
- Department of Physics, University of Gothenburg
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- Åkerman, Johan (författare)
- KTH,Materialfysik, MF,Univ Gothenburg, Sweden; NanOsc AB, Sweden
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- 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)
Nyckelord
- Physics
- Fysik
- Materials Science and Engineering
- Teknisk materialvetenskap
Publikations- och innehållstyp
- pop (ämneskategori)
- ovr (ämneskategori)
- Av författaren/redakt...
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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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visa fler...
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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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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Den kondenserade ...
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
- Av lärosätet
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Kungliga Tekniska Högskolan