Abstract
A new model is presented which explains well the dramatic decrease of the Mössbauer line intensities with raising temperatures for freely dispersed iron microscrystals. In contrast to other theories which consider mainly vibration to be responsible we discuss here the decrease in terms of large amplitude diffusive rotational or translational jumps of the particles. Such diffusive jumps lead — in agreement with the observation — to a strong reduction of the Mössbauer-intensity without broadening the line width in a noticeable way. The typical potential well for a diffusing particle in an equilibrium position is derived quantitatively to be 13 meV. The model might be important also for a new understanding of the dynamics of catalytic clusters either in contact with each other or with larger solid surfaces.
Similar content being viewed by others
References
Eynatten, G. von, Bömmel, H.E.: Appl. Phys.14, 415 (1977)
Eynatten, G. von, Bömmel, H.E.: Inst. Phys. Conf. Ser.39, 580 (1978)
Hayashi, M., Tamura, I., Fukano, Y., Kanemaki, S., Fujio, Y.: J. Phys. C13, 681 (1980)
Tamura, I., Hayashi, M.: Surf. Sci.146, 501 (1984)
Niemantsverdriet, J.W., Flipse, C.F.J., Selman, B., Loef, J.J. van, Kraan, A.M. van der: Phys. Lett.100A, 445 (1984)
Picone, P.J., Haneda, K., Morrish, A.H.: J. Phys. C15, 317 (1982)
Viegers, M.P.A., Trooster, J.M.: Phys. Rev. B15, 72 (1977)
Roth, S., Hörl, E.M.: Phys. Lett25A, 299 (1967)
Suzdalev, I.P., Gen, M.Y., Goldanskii, V.T., Makarov, E.F.: Sov. Phys. JETP24, 79 (1967)
Bussiere, P.: Rev. Phys. Appl.15, 1143 (1980)
Bussiere, P.: Rev. Phys. Appl.16, 447 (1981)
Eynatten, G. von, Horst, J., Dransfeld, K., Bömmel, H.E.: Hyperfine Interact.29, 1311 (1986)
Frauenfelder, H., Petsko, G.A., Tsernoglou, D.: Nature280, 558 (1979)
Parak, F., Knapp, E.W., Kucheida, D.: J. Mol. Biol.161, 177 (1981)
Nowik, I., Bauminger, E.R., Cohen, S.G., Ofer, S.: Phys. Rev. A31, 2291 (1985)
Petry, W., Vogl, G., Mansel, W.: Z. Phys. B46 319 (1982)
Champeney, D.C., Woodhams, F.W.D.: J. Phys. B1, 620 (1968)
Singwi, K.S., Sjølander: Phys. Rev.120, 1093 (1960)
Dattagupta, S.: Phys. Rev. B14, 1329 (1976)
Wordel, R., Litterst, F.J., Wagner, F.E.: J. Phys. F15, 2525 (1985)
Wohlfahrt E.P. (ed.): Ferromagnetic materials. Vol. 2, p. 517. Amsterdam, Oxford, New York: North Holland 1980
Niemantsverdriet, J.W., Kraan, A.M. van der, Delgass, W.N.: J. Catal.89, 138 (1984)
Topsøe, H., Clausen, B.S., Mørup, S.: Hyperfine Interact.27, 231 (1986)
Author information
Authors and Affiliations
Additional information
Part of this work was supported by the DFG Sonderforschungsbereich 306, Konstanz
Rights and permissions
About this article
Cite this article
von Eynatten, G., Ritter, T., Bömmel, H.E. et al. Diffusive motion of iron microcrystals studied by Mössbauer spectroscopy. Z. Physik B - Condensed Matter 65, 341–345 (1987). https://doi.org/10.1007/BF01303721
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01303721