Skip to main content
SpringerLink
Log in

Magnetic order in a Kondo lattice: A neutron scattering study of CeCu2Ge2

  • Original Contributions
  • Published:
Zeitschrift für Physik B Condensed Matter

Abstract

Elastic and inelastic neutron scattering studies of the Kondo lattice CeCu2Ge2 were performed. AtT N=4.1 K an incommensurate magnetic order develops with an ordering wave vectorq 0=(0.28, 0.28, 0.54) and an ordered moment µ s =0.74 µB. The crystalline electric field splits the 4f 1-J-multiplet of the Ce ion into a ground state doublet and a quartet at 191 K. The wave function of the ground state yields an ordered moment of 1.54µB. Thus, due to the onset of the formation of a Kondo singlet the magnetic moment is considerably reduced. The magnetic relaxation rate Λ was investigated via quasielastic neutron scattering. The temperature dependence of Λ(T) is characteristic of heavy-fermion systems with a high temperature square root dependence and a limiting low temperature value, yielding a Kondo temperatureT K≈10K. The quasielastic component of the scattered neutron intensities persists down to the lowest temperatures, well belowT N. This quasielastic line is regarded as a characteristic feature of heavy-fermion systems and corresponds to the enhanced value of the linear term of the specific heat.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Steglich, F.: Theory of heavy fermion systems and valence fluctuations. In: Springer Series in Solid State Sciences. Kasuya, T., Saso, T. (eds.), Vol. 62, p. 23. Berlin, Heidelberg, New York: Springer 1985

    Google Scholar 

  2. Steglich, F., Aarts, J., Bredl, C.D., Lieke, W., Meschede, D., Franz, W., Schäfer, H.: Phys. Rev. Lett.43, 1982 (1979)

    Google Scholar 

  3. Ott, H.R., Rudigier, H., Fisk, Z., Smith, J.L.: Phys. Rev. Lett.50, 1595 (1983)

    Google Scholar 

  4. Stewart, G.R., Fisk, Z., Willis, J.O., Smith, J.L.: Phys. Rev. Lett.52, 679 (1984)

    Google Scholar 

  5. Ott, H.R., Rudigier, H., Delsing, P., Fisk, Z.: Phys. Rev. Lett.52, 1551 (1984)

    Google Scholar 

  6. Fisk, Z., Stewart, G.R., Willis, J.O., Ott, H.R., Hullinger, F.: Phys. Rev.B30, 6360 (1984)

    Google Scholar 

  7. Boer, F.R. de, Klaasse, J.C.P., Veenhuizen, P.A., Böhm, A., Bredl, C.D., Gottwick, U., Mayer, H.M., Pawlak, L., Rauchschwalbe, U., Spille, H., Steglich, F.: J. Magn. Magn. Mater.63 & 64, 91 (1987)

    Google Scholar 

  8. Knopp, G., Spille, H., Loidl, A., Knorr, K., Rauchschwalbe, U., Felten, R., Weber, G., Steglich, F., Murani, A.P.: J. Magn. Magn. Matter63 & 64, 88 (1987)

    Google Scholar 

  9. Andres, K., Graebner, J.E., Ott, H.R.: Phys. Rev. Lett.35, 1979 (1975)

    Google Scholar 

  10. Stewart, G.R., Fisk, Z., Wire, M.S.: Phys. Rev.B30, 482 (1984)

    Google Scholar 

  11. Bredl, C.D., Horn, S., Steglich, F., Lüthi, B., Martin, R.M.: Phys. Rev. Lett.52, 1982 (1984)

    Google Scholar 

  12. Rauchschwalbe, U., gottwick, U., Ahlheim, U., Mayer, H.M., Steglich, F.: J. Less Comm. Met.111, 265 (1985)

    Google Scholar 

  13. Franz, W., Griessel, A., Steglich, F., Wohlleben, D.: Z. Phys. B—Condensed Matter and Quanta31, 7 (1978)

    Google Scholar 

  14. Gottwick, U., Held, R., Sparn, G., Steglich, F., Vey, K., Assmus, W., Rietschel, H., Stewart, G.R., Giorgi, A.L.: J. Magn. Magn. Mater.63 & 64, 341 (1987)

    Google Scholar 

  15. Cox, D.L., Grewe, N.: Z. Phys. B—Condensed Matter71, 321 (1988)

    Google Scholar 

  16. Desgranges, H.U., Schotte, K.D.: Phys. Lett.91A, 240 (1982)

    Google Scholar 

  17. Broholm, C., Kjems, J.K., Aeppli, G., Fisk, Z., Smith, J.L., Shapiro, S.M., Shirane, G., Ott, H.R.: Phys. Rev. Lett.58, 917 (1987)

    Google Scholar 

  18. Felten, R., Weber, G., Rietschel, H.: J. Magn. Magn. Mater.63 & 64 383 (1987)

    Google Scholar 

  19. Hutchings, M.R.: In: Solid state physics. Seitz, F., Turnbull, D. (eds). New York: Academic Press 1964

    Google Scholar 

  20. Fulde, P., Löwenhaupt, M.: Adv. Phys.34, 589 (1987)

    Google Scholar 

  21. Cox, D.L., Bickers, N.E., Wilkins, J.W.: J. Appl. Phys.57, 3166 (1985)

    Google Scholar 

  22. Bickers, N.E., Cox, D.L., Wilkins, J.W.: Phys. Rev. Lett.54, 239 (1985)

    Google Scholar 

  23. Maekawa, S., Kashiba, S., Takahashi, S., Tachiki, M.: J. Magn. Magn. Mater.53, 149 (1985)

    Google Scholar 

  24. Höhn, T., Keller, J.: J. Magn. Magn. Mater.63 & 64, 219 (1987)

    Google Scholar 

  25. Kuramoto, Y., Müller-Hartmann, E.: J. Magn. Magn. Mater.52, 122 (1985)

    Google Scholar 

  26. Czycholl, G., Leder, H.J.: Z. Phys. B—Condensed Matter48, 67 (1982)

    Google Scholar 

  27. Kojima, H., Kuramoto, Y., Tachiki, M.: Z. Phys. B—Condensed Matter54, 293 (1984)

    Google Scholar 

  28. Schlottmann, P.: Phys. Rev. B29, 4468 (1984)

    Google Scholar 

  29. Aeppli, G., Yoshizawa, H., Endoh, Y., Bucher, E., Hufnagel, J., Onuki, Y., Komatsubara, T.: Phys. Rev. Lett.57, 122 (1986)

    Google Scholar 

  30. Walter, U., Loewenhaupt, M., Holland-Moritz, E., Schlabitz, W.: Phys. Rev. B36, 1981 (1987)

    Google Scholar 

  31. During the preparation of this manuscript we became aware of a detailed neutron scattering study in CeRu2Si2: Severing, A., Holland-Moritz, E., Frick, B.: Preprint

  32. Steglich, F., Bredl, C.D., Loewenhaupt, M., Schotte, K.D.: J. Phys. (Paris)40, C5–301 (1979)

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institut für Physik, Universität Mainz, Postfach 3980, D-6500, Mainz, Federal Republic of Germany

    G. Knopp, A. Loidl & K. Knorr

  2. Institute of Inorganic Chemistry and Metallurgy of Rare Elements, Technical University, PL-50370, Wroclaw, Poland

    L. Pawlak & M. Duczmal

  3. Institut für Festkörperphysik, TH Darmstadt, Hochschulstrasse 2, D-6100, Darmstadt, Federal Republic of Germany

    R. Caspary, U. Gottwick, H. Spille & F. Steglich

  4. Institut Laue Langevin, 156X, F-38042, Grenoble, France

    A. P. Murani

Authors
  1. G. Knopp
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. Loidl
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. K. Knorr
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. L. Pawlak
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. M. Duczmal
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. R. Caspary
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. U. Gottwick
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. H. Spille
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. F. Steglich
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. A. P. Murani
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Knopp, G., Loidl, A., Knorr, K. et al. Magnetic order in a Kondo lattice: A neutron scattering study of CeCu2Ge2 . Z. Physik B - Condensed Matter 77, 95–104 (1989). https://doi.org/10.1007/BF01313625

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01313625

Keywords

Search

Navigation