Magnonics - Lecture 2 - Magnetisation precession and LLG equations

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  • Опубліковано 21 гру 2024

КОМЕНТАРІ • 2

  • @haoyangsun-eq5gc
    @haoyangsun-eq5gc 6 місяців тому +1

    Can someone help, where does mu0 come from around 12:00

    • @nanomagvie
      @nanomagvie  6 місяців тому

      Hello! Here is what our scientists have to say to your question:
      Magnetic permeability of free space (or magnetic constant) μ0 is a constant defining the relationship between magnetic field strength H (A/m) and magnetic flux density B (T) in a vacuum. On the top right corner slide 8, the Landau-Lifshitz(LL) equation is written with B, while two next equations use H. To combine these equations, we introduce mu0 in LL. Moreover, both systems of units: CGS and SI are used in the lecture in parallel.
      Thanks for watching!