Science Advances

Supplementary Materials

This PDF file includes:

  • section S1. Correspondence between nano-antiferromagnet Néel states and Fe trimer lifetime T1
  • section S2. Response of T1 to different magnetic perturbations
  • section S3. Deducing magnetic interaction between nano-antiferromagnet and Fe trimer spin sensor (Eq. 1)
  • section S4. Tuning the signal to noise by external magnetic field and interaction with magnetic tip
  • section S5. DFT calculations for the magnetic interaction
  • fig. S1. Spin-state diagram of the trimer.
  • fig. S2. Pump pulses induced switching of antiferromagnetic nanostructures.
  • fig. S3. Calibrating Fe trimer with external magnetic field.
  • fig. S4. Improving the signal-to-noise ratio by external magnetic field or local magnetic field exerted by the magnetic STM tip.
  • fig. S5. Time trace of the pump-probe signal for 4000 s about the four-state switching in Fig. 6.
  • fig. S6. Supercells used for the DFT calculations.
  • fig. S7. Calculated magnetic interaction energy for different spin chain and supercell geometries.
  • References (42–44)

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