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2009 | 115 | 2 | 568-571
Article title

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

Content
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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
Publisher

Year
Volume
115
Issue
2
Pages
568-571
Physical description
Dates
published
2009-02
Contributors
author
  • Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
author
  • Institute of Chemical and Environment Engineering Szczecin University of Technology, Pułaskiego 10, 70-322 Szczecin, Poland
author
  • Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
References
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  • 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)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv115n227kz
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