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Freezing and thawing magnetic droplet solitons.
Ahlberg, Martina; Chung, Sunjae; Jiang, Sheng; Frisk, Andreas; Khademi, Maha; Khymyn, Roman; Awad, Ahmad A; Le, Q Tuan; Mazraati, Hamid; Mohseni, Majid; Weigand, Markus; Bykova, Iuliia; Groß, Felix; Goering, Eberhard; Schütz, Gisela; Gräfe, Joachim; Åkerman, Johan.
Afiliación
  • Ahlberg M; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden.
  • Chung S; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden. sjchung76@knue.ac.kr.
  • Jiang S; Department of Physics Education, Korea National University of Education, Cheongju, 28173, Korea. sjchung76@knue.ac.kr.
  • Frisk A; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden.
  • Khademi M; School of Microelectronics, Northwestern Polytechnical University, 710072, Xi'an, China.
  • Khymyn R; Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden.
  • Awad AA; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden.
  • Le QT; Department of Physics, Shahid Beheshti University, Evin, 1983969411, Tehran, Iran.
  • Mazraati H; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden.
  • Mohseni M; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden.
  • Weigand M; Department of Physics, University of Gothenburg, 412 96, Gothenburg, Sweden.
  • Bykova I; Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden.
  • Groß F; Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden.
  • Goering E; NanOsc AB, 164 40, Kista, Sweden.
  • Schütz G; Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden.
  • Gräfe J; Department of Physics, Shahid Beheshti University, Evin, 1983969411, Tehran, Iran.
  • Åkerman J; Max Planck Institute for Intelligent Systems, Stuttgart, Germany.
Nat Commun ; 13(1): 2462, 2022 May 05.
Article en En | MEDLINE | ID: mdl-35513369
Magnetic droplets are non-topological magnetodynamical solitons displaying a wide range of complex dynamic phenomena with potential for microwave signal generation. Bubbles, on the other hand, are internally static cylindrical magnetic domains, stabilized by external fields and magnetostatic interactions. In its original theory, the droplet was described as an imminently collapsing bubble stabilized by spin transfer torque and, in its zero-frequency limit, as equivalent to a bubble. Without nanoscale lateral confinement, pinning, or an external applied field, such a nanobubble is unstable, and should collapse. Here, we show that we can freeze dynamic droplets into static nanobubbles by decreasing the magnetic field. While the bubble has virtually the same resistance as the droplet, all signs of low-frequency microwave noise disappear. The transition is fully reversible and the bubble can be thawed back into a droplet if the magnetic field is increased under current. Whereas the droplet collapses without a sustaining current, the bubble is highly stable and remains intact for days without external drive. Electrical measurements are complemented by direct observation using scanning transmission x-ray microscopy, which corroborates the analysis and confirms that the bubble is stabilized by pinning.

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2022 Tipo del documento: Article País de afiliación: Suecia

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2022 Tipo del documento: Article País de afiliación: Suecia