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Crystal-field excitations in the heavy-fermion alloys CeCu6−x Au x studied by specific heat and inelastic neutron scattering

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The specific heat of CeCu6−x Au x withx=0,0.3, and 0.9, and of the corresponding La homologues has been measured between 1.5 K and 150 K. With increasingx we find progressively better-defined Schottky anomalies arising from the crystal-field splitting, which is attributed to the decrease of the Kondo temperature. Both observations are in line with the results of inelastic neutron-scattering data performed on samples withx=0.5. Overall, the crystal-field splitting does not change very much upon alloying with Au. A detailed analysis shows that forx=0.5 the quasielastic line width is smaller and the inelastic crystal-field transitions are better resolved compared to CeCu6.

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  1. 1.

    Stewart, G.R.: Rev. Mod. Phys.56, 755 (1984); Grewe, N., Steglich, F.: In: Handbook of the physics and chemistry of rare earths, Vol. 14, p. 343. Gschneidner Jr., K.A., Eyring, L. (eds.). Amsterdam: Elsevier

  2. 2.

    Walter, U., Wohlleben, D., Fisk, Z.: Z. Phys. B62, 325 (1986)

  3. 3.

    Rietschel, H., Renker, B., Felten, R., Steglich, F., Weber, G.: J. Magn. Magn. Mater.76, 77, 105 (1988)

  4. 4.

    Onuki, Y., Shimizu, Y., Komatsubara, T., Sumiyama, A., Oda, Y., Nagano, H., Fujita, T., Maeno, Y., Satoh, K., Ohtsuka, T.: J. Magn. Magn. Mater52, 344 (1985); Fujita, T., Satoh, K., Onuki, Y., Komatsubara, T.: J. Magn. Magn. Mater47, 48, 66 (1985)

  5. 5.

    Fischer, H.E., Swartz, E.T., Pohl, R.O., Jones, B.A., Wilkins, J.W., Fisk, Z.: Phys. Rev. B36, 5330 (1987)

  6. 6.

    Oomi, G., Takahashi, K., Ohkawa, F.J., Onuki, Y., Komatsubara, T.: Physica B148, 61 (1987)

  7. 7.

    Takagayani, S., Onuki, Y., Komatsubara, T.: J. Phys. Soc. Jpn.55, 2384 (1986)

  8. 8.

    Zemirli, S., Barbara, B.: Solid State Commun.56, 385 (1985)

  9. 9.

    Weber, D., Yoshizawa, M., Kouroudis, I., Lüthi, B., Walker, E.: Europhys. Lett.3, 827 (1987)

  10. 10.

    Goremychkin, E.A., Osborn, R.: Preprint RAL-91-072

  11. 11.

    Desgranges, H.-U., Rasul, J.W.: Phys. Rev. B32, 6100 (1985); ibid. B36, 328 (1987)

  12. 12.

    Chattopadhyay, T., v. Löhneysen, H., Trappmann, T., Loewenhaupt, M.: Z. Phys.B80, 159 (1990)

  13. 13.

    Rossat-Mignod, J., Regnault, L.P., Jacoud, J.L., Vetter, C., Lejay, P., Flouquet, J., Walker, E., Jaccard, D., Amato, A.: J. Magn. Magn. Mater76, 77, 376 (1988)

  14. 14.

    Schlager, H.G., Schröder, A., Welsch, M., v. Löhneysen, H.: J. Low Temp. Phys. (in press)

  15. 15.

    Germann, A., v. Löhneysen, H.: Europhys. Lett.9, 367 (1989)

  16. 16.

    v. Löhneysen, H., Schröder, A., Trappmann, T., Welsch, M.: J. Magn. Magn. Mater108, 45 (1992)

  17. 17.

    Amato, A., Jaccard, D., Flouquet, J., Lapierre, F., Tholence, J., Fisher, R.A., Lacy, S.E., Olsen, J.A., Phillips, N.E.: J. Low Temp. Phys.68, 371 (1987)

  18. 18.

    Schröder, A.: Dissertation, Universität Karlsruhe (1991), unpublished

  19. 19.

    Winter, H.: (Private communication)

  20. 20.

    Cox, D.L., Bickers, N.E., Wilkins, J.W.: J. Magn. Magn. Mater54–57, 333 (1986)

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Stroka, B., Schröder, A., Trappmann, T. et al. Crystal-field excitations in the heavy-fermion alloys CeCu6−x Au x studied by specific heat and inelastic neutron scattering. Z. Physik B - Condensed Matter 90, 155–160 (1993). https://doi.org/10.1007/BF02198148

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