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2015 | 127 | 2 | 549-551
Article title

Oxidation Kinetics of Thin and Ultrathin Fe Films

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EN
Abstracts
EN
We have studied oxidation kinetics of Fe thin films under atmospheric conditions using the fact that metallic iron is a ferromagnet but ultrathin natural iron oxides are practically nonmagnetic at room temperature. As a consequence, oxidation is associated with a loss in ferromagnetism. Fe thin films were deposited onto 1.5 nm V thick buffer layer using UHV magnetron sputtering. As a substrate we have used Si(100) wafers with an oxidised surface. Results show that all samples with an initial Fe thickness greater than 6 nm oxidize practically instantaneously, whereby a constant amount of 2.5 nm of metal is transformed into oxides. For iron thickness lower than 6 nm the time constant for oxidation increases considerably reaching a value of 30 days for the initial Fe thickness equal to 4 nm.
Keywords
EN
Contributors
  • Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
  • NanoBioMedical Centre, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
References
  • [1] R. Cornell, U. Schwertmann, The Iron Oxides, Wiley, New York 1997
  • [2] M. Monti, B. Santos, A. Mascaraque, O. Rodriguez de la Fuente, M.A. Niño, T.O. Menteş, A. Locatelli, K.F. McCarty, J.F. Marco, J. de la Figuera, J. Phys. Chem. C 116, 11539 (2012), doi: 10.1021/jp300702d
  • [3] L. Smardz, U. Köbler, W. Zinn, J. Appl. Phys. 71, 5199 (1992), doi: 10.1063/1.351378
  • [4] L. Smardz, M. Nowak, M. Jurczyk, Int. J. Hydrogen En. 37, 3659 (2012), doi: 10.1016/j.ijhydene.2011.04.039
  • [5] K. Smardz, L. Smardz, Phys. Status Solidi B 243, 223 (2006), doi: 10.1002/pssb.200562419
  • [6] See for example, The Physics and Chemistry of SiO₂ and the Si-SiO₂ Interface, Eds. C.R. Helms, B.E. Deal, Plenum, New York 1988
  • [7] L. Smardz, K. Smardz, Mater. Sci.-Poland 24, 821 (2006)
  • [8] A. Marczyńska, B. Szymański, J. Skoryna, L. Smardz, Acta Phys. Pol. A 127, 552 (2015), doi: 10.12693/APhysPolA.127.552
  • [9] L. Smardz, Solid State Commun. 112, 693 (1999), doi: 10.1016/S0038-1098(99)00426-3
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n2127kz
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