STRUCTURE AND MAGNETIC PROPERTIES OF NICKEL-CARBON NANOCOMPOSITES PREPARED BY SOLID-PHASE PYROLYSIS OF NICKEL PHTHALOCYANINE

摘要

By using solid-phase pyrolysis of Ni-phthalocyanine we have synthesized nickel-carbon nanocomposites with the mean diameter of Ni nanoparticles of 45 nm. The composition and structure of the samples were investigated by scanning and transmission electron microscopy and X-ray diffraction. Magnetic characteristics of the nanocomposites were measured with a vibrational magnetometer. The major fraction of the nanoparticles is single-domain ferromagnetic in the temperature range of 6-300 K, while a small fraction is in a superparamagnetic state with blocking temperatures below 25 K.