Scanning Tunneling Spectra and Low Energy Ion Scattering Studies of the Verwey Transition in MBE Fe_3O_4 (100) Thin Film

• Authors: N. Kim-Ngan , W. Soszka , M. Hietschold
• Languages of publication: EN

Abstracts

EN

The (100) surface of magnetite Fe_3O_4 thin film was studied by a UHV low-temperature scanning tunneling microscope and by an ion scattering spectroscopy. The tunneling spectra revealed a widening of the gap with decreasing temperature, which may be related to the metal-insulator phase transition in this material. A strong effect of this phase transition on ion scattering from such a surface was observed. The temperature dependence of the scattered ion yield, R^+(T), revealed two minima at around 100 K and at 125 K under Ne^+ bombardment with the primary energy up to 6 keV. The disappearance of the high-temperature minimum at a bombarding energy of 6.5 keV gave a further evidence for the ion velocity dependence of the character of the R^+(T) curve, which has been first observed for a MBE Fe_3O_4 (111) film surface.

Keywords

EN

61.16.Ch; 61.18.Bn; 71.30.+h

Discipline

• 71.30.+h: Metal-insulator transitions and other electronic transitions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 2
• Pages: 267-276

Dates

published

2001-02

received

2000-12-27

Contributors

author

N. Kim-Ngan

• Institute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland

author

W. Soszka

• Institute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland

author

M. Hietschold

• Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany

References

• 1. N. Tsuda, K. Nasu, Y. Yanase, K. Siratori, in: Electronic Conductions in Oxides, Vol. 94, Eds. M. Cardona, P. Fulde, K. von Klitzing, H.-J. Queisser, Springer-Verlag Series in Solid-State Sciences, Springer, Berlin 1990, p. 207
• 2. R. Wiesendanger, I.V. Shvets, J.M.D. Coey, Vac. Sci. Technol. B, 12, 2118, 1994; R. Wiesendanger, I.V. Shvets, D. Burgler, G. Tarrach, H.-J. Guntherodt, J.M.D. Coey, S. Graser, Science, 255, 583, 1992
• 3. R. Jansen, V.A.M. Brabers, H. Van Kempen, Surf. Sci., 328, 237, 1995
• 4. A.R. Lennie, N.G. Condon, F.M. Leibsle, P.W. Murray, G. Thornton, D.J. Vaughan, Phys. Rev. B, 53, 10244, 1996
• 5. N.G. Condon, F.M. Leibsle, T. Parker, A.R. Lennie, D.J. Vaughan, G. Thornton, Phys. Rev. B, 55, 15885, 1997
• 6. W. Weiss, A. Barbieri, M.A. Van Hove, G.A. Somorjai, Phys. Rev. Lett., 71, 1848, 1993
• 7. J.M. Gaines, P.J.H. Bloemen, J.T. Kohlhepp, C.W.T. Bulle-Lieuwma, R.M. Wolf, A. Reinders, R.M. Jungblut, P.A.A. van der Heijden, J.T.W.M. van Eemeren, J. aan de Stegge, W.J.M. de Jonge, Surf. Sci., 373, 85, 1997 and references therein
• 8. J.M. Gaines, J.T. Kohlhepp, J.T.W.M. van Eemeren, R.J.G. Elfrink, F. Roozeboom, W.J.M. de Jonge, Mater. Res. Soc. Symp. Proc., 474, 191, 1997
• 9. S. Speller, M. Schleberger, H. Franke, C. Muller, W. Heiland, Mod. Phys. Lett. B, 8, 491, 1994 and references therein
• 10. E. van de Riet, H. Derks, W. Heiland, Surf. Sci., 234, 53, 1990
• 11. N.-T.H. Kim-Ngan, W. Soszka, J. Magn. Magn. Mater., 202, 327, 1999
• 12. W. Soszka, N.-T.H. Kim-Ngan, Surf. Sci., 441, 331, 1999
• 13. N.-T.H. Kim-Ngan, W. Soszka, D. Sitko, G. Jagło, J. Korecki, B. Handke, Nucl. Instrum. Methods Phys. Res. B, 164-165, 992, 2000
• 14. W. Soszka, N.-T.H. Kim-Ngan, D. Sitko, G. Jagło, J. Korecki, B. Handke, Vacuum, 59, 868, 2000
• 15. A. Barbieri, W. Wiess, M.A. van Hove, G.A. Somorjai, Surf. Sci., 302, 259, 1994
• 16. B. Handke, J. Haber, T. lzak, M. Kubik, J. Korecki, Vacuum, in press
• 17. S. Sugita, Y. Mera, K. Maeda, J. Appl. Phys., 79, 4166, 1996
• 18. B. Raquet, J.M.D. Coey, S. Wirth, S. von Molnár, Phys. Rev. B, 59, 12435, 1999
• 19. D.P. Woodruff, Nucl. Instrum. Methods, 194, 639, 1982

Identifiers

DOI

10.12693/APhysPolA.99.267