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2008 | 113 | 1 | 561-564
Article title

Low-Temperature Magnetic Properties of Nanometric Fe-Based Particles

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EN
Abstracts
EN
Fe-based nanoparticles were prepared by laser-driven pyrolysis. The as-synthesised powder consists ofα-Fe and Fe_3O_4/γ-Fe_2O_3 nanoparticles embedded in a pyrolytic carbon matrix. The crystallite size of 1.8 nm forα-Fe was calculated using the Scherrer formula. The as-synthesised nanopowder was superparamagnetic. The maximum of the zero-field cooling curve was observed at 32 K and the distribution of blocking temperatures g(T_B) peaked at 11 K. As a result of small particle sizes and the soft matrix, the Lamb-Mössbauer factor f was significantly higher at 4 K than at 293 K.
Keywords
Contributors
author
  • Intitute of Physics of Materials, AS CR,, Žižkova 22, 61662 Brno, Czech Republic
  • Intitute of Physics of Materials, AS CR,, Žižkova 22, 61662 Brno, Czech Republic
author
  • Institute of Physics, AS CR, Na Slovance 2, 18221 Praha 8, Czech Republic
  • National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, 76900 Bucharest, Romania
author
  • National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, 76900 Bucharest, Romania
References
  • 1. R. Alexandrescu, I. Morjan, F. Dumitrache, I. Voicu, I. Soare, I. Sandu, C.T. Fleaca, Solid State Phenom. 99-100, 181 (2004)
  • 2. V. Ciupina, G. Prodan, F. Dumitrache, I. Morjan, R. Alexandrescu, E. Popovici, I. Soare, L. Albu, R. Birjega, B. David, O. Schneeweiss, Proc. SPIE 5924, 592418-1 (2005)
  • 3. S. Morup, J.A. Dumesic, H. Topsoe, in: Applications of Mössbauer Spectroscopy, Ed. R.L. Cohen, Academic Press, New York 1980, p. 1
  • 4. W.H. Meiklejohn, C.P. Bean, Phys. Rev. 105, 904 (1957)
  • 5. R.D. Shull, L.H. Bennett, NanoStructured Materials 1, 83 (1992)
  • 6. R.M. Cornell, U. Schwertmann, The Iron Oxides, VCH Publishers, Weinheim 1996, Ch. 7
  • 7. U. Gonser, M ossbauer Spectroscopy, Springer Verlag, Berlin 1975, Ch. 1
  • 8. C.C. Yang, M.X. Xiao, W. Li, Q. Jiang, Solid State Commun. 139, 148 (2006)
  • 9. J. Cieslak, B.F.O. Costa, S.M. Dubiel, M. Reissner, W. Steiner, J. Phys., Condens. Matter 16, L343 (2004)
  • 10. J.J. Lu, H.Y. Deng, H.L. Huang, J. Magn. Magn. Mater. 209, 37 (2000)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1137kz
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