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  Micromagnetic view on ultrafast magnon generation by femtosecond spin current pulses

Ulrichs, H., & Razdolski, I. (2018). Micromagnetic view on ultrafast magnon generation by femtosecond spin current pulses. Physical Review B, 98(5): 054429. doi:10.1103/PhysRevB.98.054429.

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1802.01305.pdf (Publisher version), 3MB
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PhysRevB.98.054429.pdf (Publisher version), 3MB
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PhysRevB.98.054429.pdf
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 Creators:
Ulrichs, Henning1, Author
Razdolski, Ilya2, Author           
Affiliations:
1Physical Institute, Georg-August University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany, ou_persistent22              
2Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: Condensed Matter, Mesoscale and Nanoscale Physics, cond-mat.mes-hall
 Abstract: In this Article we discuss a micromagnetic modelling approach to describe the ultrafast spin-transfer torque excitation of coherent and incoherent magnons on the nanoscale. Implementing the action of a femtosecond spin current pulse entering an orthogonally magnetized thin ferromagnetic film, we reproduce recent experimental results and reveal the factors responsible for the unequal excitation efficiency of various spin waves. Our findings are in an excellent agreement with the results of an analytical description of spin-wave excitation based on classical kinetic equations. Furthermore, we suggest an experimental design allowing for the excitation of laterally propagating spin waves beyond the optical diffraction limit. Our findings demonstrate that the classical micromagnetic picture retains its predictive and interpretative power on femtosecond temporal and nanometer spatial scales.

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Language(s): eng - English
 Dates: 2018-02-052018-01-262018-08-272018-08
 Publication Status: Issued
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: 11 Volume / Issue: 98 (5) Sequence Number: 054429 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008