Synthesis, characterization and study of low temperature ferromagnetic behavior of glossy carbon film obtained from karanja oil

Glossy carbon films were obtained from karanja oil in hydrogen atmosphere by simple pyrolysis technique. Micro-Raman, X-ray diffraction, and scanning electron microscope were used to characterize the samples which reveal the amorphous nature of film made of sp(2) and sp(3) type carbon. The ferromagnetic nature of the film at temperature 5 K was confirmed using superconducting quantum interferometric device magnetometer. The X-ray photoelectron spectroscopy data for the film has suggested the low enough percentage of ferromagnetic metallic oxide as an impurity, which has no influence on present ferromagnetic property. Analysis of the magnetization curve observed in the magnetic field range -50 to 50 kOe has explored the ferromagnetic behavior of glossy carbon film at low temperature. (C) 2011 Elsevier B.V. All rights reserved.