Nickel nanoparticles in carbon structures prepared by solid-phase pyrolysis of nickel-phthalocyanine

• DOI: 10.1007/s11051-012-0982-6
• Publication Date: 2012-06-28T03:18:41Z
• Authors: A. S. Manukyan; A. A. Mirzakhanyan; G. R. Badalyan; G. H. Shirinyan; A. G. Fedorenko; N. V. Lianguzov; Yu I. Yuzyuk; L. A. Bugaev; E. G. Sharoyan
• Keywords: Carbon fibers; Amorphous carbon; Ferromagnetic material properties

By using a modified method of solid-phase pyrolysis of metal-phthalocyanines, we have synthesized ferromagnetic Ni nanoparticles in different carbon structures: amorphous carbon plates, multiwall carbon nanotubes, carbon fibers, and graphitized capsules. The composition, structure and morphology of prepared composite materials have been studied by energy dispersive X-ray microanalysis, scanning and transmission electron microscopy, and X-ray diffraction technique. It has been found that the sizes of nickel nanoparticles (10–500 nm) and the type of carbon structures strongly depend on the pyrolysis conditions. By using the X-band ferromagnetic resonance measurements, we have revealed features of the temperature dependence of resonance spectra of single-domain and multi-domain Ni nanoparticles in Ni/C composites.