Abstract
Pyrolysis of triethylamine in reduced pressure yielded carbon-based magnetic materials. A sample pyrolized at 1198 K for 30 min. showed ferromagnetic behavior at 300 K. The saturation magnetization of this sample was 0.53 emu/g at 300 K, and its Curie temperature was above 800 K. After annealing at 800 K in a magnetic field of 1 T, the magnetization of this sample increased from 0.49 to 0.62 emu/g at 1 T. In the ESR spectra, the sample’s spin density decreased after annealing in a magnetic field. These results suggest that annealing in a magnetic field causes rearrangement of the radical spin.
