Microstructure and magnetic behavior of carbon-coated Co nanoparticles studied by nuclear magnetic resonance

Abstract
Spin-echo nuclear magnetic resonance (NMR) experiments have been carried out at 4.2 K and room temperature on carbon-coated nanoscale (average diameter ≈20 nm) face-centered-cubic (fcc) Co particles prepared by the Kratschmer carbon arc process for 0⩽H⩽9.0 kOe. Information concerning the magnetic structure and paramagnetic relaxation behavior of the nanoscale particle system has been obtained.