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Extreme Domain Wall Speeds under Ultrafast Optical Excitation.
Jangid, Rahul; Hagström, Nanna Zhou; Madhavi, Meera; Rockwell, Kyle; Shaw, Justin M; Brock, Jeffrey A; Pancaldi, Matteo; De Angelis, Dario; Capotondi, Flavio; Pedersoli, Emanuele; Nembach, Hans T; Keller, Mark W; Bonetti, Stefano; Fullerton, Eric E; Iacocca, Ezio; Kukreja, Roopali; Silva, Thomas J.
Afiliación
  • Jangid R; Department of Materials Science and Engineering, University of California Davis, Davis, California, USA.
  • Hagström NZ; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Madhavi M; Department of Materials Science and Engineering, University of California Davis, Davis, California, USA.
  • Rockwell K; Department of Physics, Stockholm University, 106 91 Stockholm, Sweden.
  • Shaw JM; Department of Materials Science and Engineering, University of California Davis, Davis, California, USA.
  • Brock JA; Center for Magnetism and Magnetic Nanostructures, University of Colorado Colorado Springs, Colorado Springs, Colorado, USA.
  • Pancaldi M; Quantum Electromagnetics Division, National Institute of Standards and Technology, Boulder, Colorado, USA.
  • De Angelis D; Center for Memory and Recording Research, University of California San Diego, La Jolla, California, USA.
  • Capotondi F; Elettra Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14 km 163.5, 34149 Trieste, Italy.
  • Pedersoli E; Elettra Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14 km 163.5, 34149 Trieste, Italy.
  • Nembach HT; Elettra Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14 km 163.5, 34149 Trieste, Italy.
  • Keller MW; Elettra Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14 km 163.5, 34149 Trieste, Italy.
  • Bonetti S; Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
  • Fullerton EE; Associate, Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
  • Iacocca E; Quantum Electromagnetics Division, National Institute of Standards and Technology, Boulder, Colorado, USA.
  • Kukreja R; Department of Physics, Stockholm University, 106 91 Stockholm, Sweden.
  • Silva TJ; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, 30172 Venezia, Italy.
Phys Rev Lett ; 131(25): 256702, 2023 Dec 22.
Article en En | MEDLINE | ID: mdl-38181360
ABSTRACT
Time-resolved ultrafast EUV magnetic scattering was used to test a recent prediction of >10 km/s domain wall speeds by optically exciting a magnetic sample with a nanoscale labyrinthine domain pattern. Ultrafast distortion of the diffraction pattern was observed at markedly different timescales compared to the magnetization quenching. The diffraction pattern distortion shows a threshold dependence with laser fluence, not seen for magnetization quenching, consistent with a picture of domain wall motion with pinning sites. Supported by simulations, we show that a speed of ≈66 km/s for highly curved domain walls can explain the experimental data. While our data agree with the prediction of extreme, nonequilibrium wall speeds locally, it differs from the details of the theory, suggesting that additional mechanisms are required to fully understand these effects.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos