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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Spintronic devices leverage spin, charge, and orbital interactions.
  • Spin pumping detects magnetization dynamics by converting magnons into spin currents.
  • Existing methods require secondary elements for spin-to-charge conversion.

Purpose of the Study:

  • To report the experimental observation of charge pumping.
  • To demonstrate direct conversion of magnons into high-frequency charge currents.
  • To explore the underlying relativistic spin-orbit interaction.

Main Methods:

  • Experimental observation of charge pumping in a precessing ferromagnet.
  • Utilizing relativistic spin-orbit interaction for direct conversion.
  • Characterization of the generated high-frequency charge current.

Main Results:

  • Experimental evidence of charge pumping achieved.
  • Direct conversion of magnons into a detectable charge current demonstrated.
  • Elimination of the need for secondary spin-charge conversion mechanisms.

Conclusions:

  • Charge pumping is a direct method for generating detectable charge currents from magnons.
  • This phenomenon offers a simpler approach to detecting magnetization dynamics.
  • Provides insights into spin-orbit torque, crucial for magnetic information manipulation.