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Direct Observation ...
Direct Observation of Zhang-Li Torque Expansion of Magnetic Droplet Solitons
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- Chung, Sunjae (author)
- Gothenburg University,Göteborgs universitet,Uppsala universitet,KTH,Tillämpad fysik,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden.;Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden.,Institutionen för fysik och astronomi,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden;KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, S-16440 Kista, Sweden,Institutionen för fysik (GU),Department of Physics (GU)
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- Le, Quang Tuan, 1976- (author)
- Gothenburg University,Göteborgs universitet,KTH,Tillämpad fysik,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden;KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, S-16440 Kista, Sweden,Institutionen för fysik (GU),Department of Physics (GU)
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- Ahlberg, Martina (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Awad, Ahmad (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Weigand, Markus (author)
- Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany.
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- Bykova, Iuliia (author)
- Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany.
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- Khymyn, Roman (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Dvornik, Mykola (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Mazraati, Hamid (author)
- KTH,Tillämpad fysik,KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, S-16440 Kista, Sweden;NanOsc AB, S-16440 Kista, Sweden
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- Houshang, Afshin (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Jiang, Sheng (author)
- KTH,Tillämpad fysik,KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, S-16440 Kista, Sweden
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- Anh Nguyen, T. N. (author)
- Gothenburg University,Göteborgs universitet,KTH,Tillämpad fysik,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden;KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, S-16440 Kista, Sweden;Vietnam Acad Sci & Technol, Inst Mat Sci, Lab Magnetism & Superconduct, 18 Hoang Quoc Viet, Hanoi 122300, Vietnam,Institutionen för fysik (GU),Department of Physics (GU)
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- Goering, Eberhard (author)
- Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany.
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- Schuetz, Gisela (author)
- Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany.
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- Graefe, Joachim (author)
- Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany.
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- Åkerman, Johan (author)
- Gothenburg University,Göteborgs universitet,KTH,Tillämpad fysik,Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden;KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, S-16440 Kista, Sweden;NanOsc AB, S-16440 Kista, Sweden,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- AMER PHYSICAL SOC, 2018
- 2018
- English.
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In: Physical Review Letters. - : AMER PHYSICAL SOC. - 0031-9007 .- 1079-7114. ; 120:21
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- Magnetic droplets are nontopological dynamical soli tons that can be nucleated in nanocontact based spin torque nano-oscillators (STNOs) with perpendicular magnetic anisotropy free layers. While theory predicts that the droplet should be of the same size as the nanocontact, its inherent drift instability has thwarted attempts at observing it directly using microscopy techniques. Here, we demonstrate highly stable magnetic droplets in all-perpendicular STNOs and present the first detailed droplet images using scanning transmission X-ray microscopy. In contrast to theoretical predictions, we find that the droplet diameter is about twice as large as the nanocontact. By extending the original droplet theory to properly account for the lateral current spread underneath the nanocontact, we show that the large discrepancy primarily arises from current-in-plane Zhang-Li torque adding an outward pressure on the droplet perimeter. Electrical measurements on droplets nucleated using a reversed current in the antiparallel state corroborate this picture.
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)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
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
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Weigand, Markus
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Bykova, Iuliia
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show more...
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Khymyn, Roman
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Dvornik, Mykola
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Mazraati, Hamid
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Houshang, Afshin
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Jiang, Sheng
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Anh Nguyen, T. N ...
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Goering, Eberhar ...
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Schuetz, Gisela
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Graefe, Joachim
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Åkerman, Johan
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show less...
- 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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Physical Review ...
- By the university
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Royal Institute of Technology
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Uppsala University
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University of Gothenburg