Magnetic Investigation of Carbon Coated Co-, Ni- and Fe-Nanoparticles

• Authors: M. Makarewicz , M. Podsiadły , M. Bałanda
• Languages of publication: EN

Abstracts

EN

Carbon coated cobalt-, nickel- and iron-nanoparticles were prepared by chemical method and their structural and magnetic properties were investigated. The samples were synthesized by carburization of the nanocrystalline form of the appropriate metal in CH_4, followed up by the reduction of the obtained carbon deposits. The X-ray diffraction and transmission electron microscopy study revealed carbon coated Co-, Ni- and Fe-nanocapsules of the mean size ca. 50 nm, and a small amount of carbon nanotubes. The measurements of magnetization and AC susceptibility were carried out for samples with different carbon content. A special attention was paid to the low temperature magnetic behavior. Decrease in the saturation moment at T=4.2 K due to the nanosize of the particles was stronger for the samples with higher carbon content, while the coercivity field (610 Oe, 330 Oe and 390 Oe, for Co-, Ni-, and Fe-particles, respectively) was independent of carbon content. From the temperature dependence of AC and DC susceptibility a wide size distribution of the particles and blocking temperature above room temperature could be expected.

Keywords

EN

75.75.+a; 75.50.Tt

Discipline

• 75.50.Tt: Fine-particle systems; nanocrystalline materials

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 2
• Pages: 568-571

Dates

published

2009-02

Contributors

author

M. Makarewicz

• Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland

author

M. Podsiadły

• Institute of Chemical and Environment Engineering Szczecin University of Technology, Pułaskiego 10, 70-322 Szczecin, Poland

author

M. Bałanda

• Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland

References

• 1. Z.D. Zhang, J. Mater. Sci. Technol. 23, 1 (2007); www.jmst.org/pcn/qikan/manage/wenzhang/2006331.pdf
• 2. E.M. Brunsman, R. Sutton, E. Bortz, S. Kirkpatrick, K. Midelfort, J. Williams, P. Smith, M.E. McHenry, S.A. Majetich, J.O. Artman, M. De Graef, S.W. Staley, J. Appl. Phys. 75, 5882 (1994)
• 3. X.L. Dong, Z.D. Zhang, Y.C. Chuang, S.R. Jin, Phys. Rev. B 60, 3017 (1999)
• 4. U. Narkiewicz, M. Podsiadły, W. Arabczyk, M.J. Woźniak, K.J. Kurzydłowski, Mater. Sci. Eng. C 27, 1273 (2007)
• 5. Ullmann's Encyclopedia of Industrial Chemistry, 6th ed., CD-ROM version, 2004
• 6. E. Flahaut, F. Agnoli, J. Sloan, C. O'Connor, M.L.H. Green, Chem. Mater. 14, 2553 (2002)

Identifiers

DOI

10.12693/APhysPolA.115.568