Attenuation of surface-enhanced Raman scattering of magnetic-plasmonic FePt@Ag core-shell nanoparticles due to an external magnetic field

- We study the SERS activity of FePt@Ag nanoparticles (NPs) under magnetic field.
- The SERS activity linearly decreases with increasing the magnetic field strength.
- The reduction of SERS activity is more pronounced for FePt@Ag than that for Ag NPs.
- The more pronounced effect observed in FePt@Ag is due to the local magnetic field.