Abstract
Using the 93.31 keV Mössbauer transition in67Zn we have investigated hyperfine interactions and lattice-dynamic effects of nanostructured hexagonal (wurtzite) ZnO. The nanocrystals with particle sizes between 3 and 30 ran were produced by a reactive-gas sublimation method and were subsequently compacted into solid bodies under external pressure. The nanocrystalline materials were used as sources in Mössbauer emission experiments. A drastic increase of the asymmetry parameter was found fromη=0 (single crystal) toη≈0.5 (nanostructured material). Our theoretical Hartree-Fock cluster calculations show that displacements of the Zn atoms off the hexagonal symmetry axis as small as 0.005 Å can lead to such enhancedη parameters. The Lamb-Mössbauer factorf drastically drops when the particle size is reduced below ∼ 10 nm. Two lattice-dynamic models are discussed which successfully describe this behavior.
Similar content being viewed by others
References
H. Gleiter, in:Proc. 2nd Rise Int. Symp. on Metallurgy and Materials Science, eds. N. Hansen, T. Leffers and H. Lilholt (Risø National Laboratory, Roskilde, 1981) p. 15.
H. Gleiter, J. Appl. Cryst. 24 (1991) 79.
H. Gleiter, in:Progress in Materials Science, Vol. 33, eds. J.W. Christian, P. Haasen and T.B. Massalski (Pergamon, Oxford, 1989) p. 223, and references therein.
M.C. Payne, in:Mechanical Properties and Deformation Behavior of Materials Having Ultra-Fine Microstructures, eds. M. Nastasi, D.M. Parkin and H. Gleiter (Kluwer Academic, Dordrecht, 1993) p. 37, and references therein.
W. Potzel, Hyp. Int.40(1988) 171.
W. Potzel, Hyp. Int. 71 (1992) 1515.
W. Potzel, in:Mössbauer Spectroscopy Applied to Magnetism and Materials Science, Vol. 1, eds. G.J. Long and F. Grandjean (Plenum Press, New York, 1993) p. 305.
S.J. Campbell and H. Gleiter, in:Mössbauer Spectroscopy Applied to Magnetism and Materials Science, Vol. 1, eds. G.J. Long and F. Grandjean (Plenum Press, New York, 1993) p. 241.
W. Schiessl, W. Potzel, H. Karzel, C. Schäfer, M. Steiner, M. Peter, G.M. Kalvius, I. Halevy, J. Gal, W. Schäfer and G. Will, Hyp. Int. 68 (1991) 161.
W. Schiessl, W. Potzel, H. Karzel, M. Steiner, M. Köfferlein, G.M. Kalvius, K. Melzer, G. Dietzmann, A. Martin, I. Halevy, J. Gal, W. Schäfer, G. Will, D.W. Mitchell and T.P. Das, Hyp. Int. 90 (1994) 359.
W. Potzel, W. Adlassnig, U. Närger, Th. Obenhuber, K. Riski and G.M. Kalvius, Phys. Rev. B 30(1984)4980.
C. Schäfer, W. Potzel, W. Adlassnig, P. Pöttig, E. Ikonen and G.M. Kalvius, Phys. Rev. B 37 (1988)7247.
H. Karzel, W. Potzel, C. Schäfer, M. Steiner, J. Moser, W. Schiessl, M. Peter, G.M. Kalvius, D.W. Mitchell, S.B. Sulaiman, N. Sahoo andT.P. Das, Hyp. Int. 70 (1992) 1067.
D.W. Mitchell, T.P. Das, W. Potzel, G.M. Kalvius, H. Karzel, W. Schiessl, M. Steiner and M. Köfferlein, Phys. Rev. B 48 (1993) 16449.
D.W. Mitchell, PhD Thesis, State University of New York at Albany, Albany, USA (1993).
P. Blaha, Institut für Technische Elektrochemie, Technische Universität Wien, Vienna, private Communications.
M.P.A. Viegers and J.M. Trooster, Phys. Rev. B 15 (1977) 72.
N. Soga and O. Anderson, J. Appl. Phys. 35 (1967) 2985.
S. Ramasamy, J. Jiang, H. Gleiter, R. Birringer and U. Gonser, Solid State Commun. 74 (1990) 851.
B. Ganguly, F.E. Huggins, Z. Feng and G.P. Huffman, Phys. Rev. B 49 (1994) 3036.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Karzel, H., McMahon, G., Potzel, W. et al. 67Zn-Mössbauer study of nanostructured ZnO. Hyperfine Interact 95, 247–255 (1995). https://doi.org/10.1007/BF02146317
Issue Date:
DOI: https://doi.org/10.1007/BF02146317