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Magnetic ordering in CeCu6−x Au x single crystals: Thermodynamic and transport properties

Abstract

We report on measurements of the magnetizationM, specific heatC, resistivity ρ, and magnetoresistivity of CeCu 6−x Au x single crystals (x=0.3 and 0.5) grown by the Czochralski method. Antiferromagnetic ordering is observed inM andC for temperatures less thanT N=0.48 K (x=0.3) and 0.95 K (x=0.5), similar to the ordering temperatures found previously for polycrystalline samples. As a function of magnetic fieldB, M(B) andC(T, B) are strongly anisotropic, with the easy axis along the crystallographicc direction (orthorhombic notation) as for pure CeCu 6 . For large magnetic fields where the magnetic ordering is suppressed, the specific heat can be described by the resonance-level model suggestive of a single-ion Kondo effect, similar to CeCu 6 where for largeB the short-range magnetic correlations are suppressed. The averaged Kondo temperature as determined from a number of properties decreases with increasingx, withT K=4.0 K forx=0.3 and 3.0 K forx=0.5, compared to 5.8 K forx=0. The magnetoresistivity shows a negative contribution arising from incoherent Kondo scattering and a positive contribution associated with the magnetic order.

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References

  1. 1.

    G. R. Stewart,Rev. Mod. Phys. 56, 755 (1984).

  2. 2.

    N. Grewe and F. Steglich, inHandbook of the Physics and Chemistry of Rare Earths, K. A. Gschneider, Jr. and L. Eyring, eds. (Elsevier, Amsterdam, 1991), Vol. 14, p 343.

  3. 3.

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

  4. 4.

    T. Fujita, K. Satoh, Y. Onuki and T. Komatsubara,J. Magn. Magn. Mat. 47 & 48, 66 (1985); Y. Onuki and T. Komatsubara,J. Magn. Magn. Mat. 63 & 64, 281 (1987), and references therein.

  5. 5.

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

  6. 6.

    J. Rossat-Mignod, L. P. Regnault, J. L. Jacoud, C. Vetter, P. Lejay, J. Flouquet, E. Walker, D. Jaccard, and A. Amato,J. Magn. Magn. Mat. 76 & 77, 376 (1988).

  7. 7.

    A. Schröder, H. G. Schlager, and H. v. Löhneysen,J. Magn. Magn. Mat. 108, 47 (1992).

  8. 8.

    A. Germann, A. K. Nigam, J. Dutzi, A. Schröder, and H. v. Löhneysen,J. de Phys. (Paris)Colloc. 49, C-8, 755 (1988).

  9. 9.

    A. Germann and H. v. Löhneysen,Europhys. Lett. 9, 367 (1989); H. v. Löhneysen, A. Germann, and A. Schröder,Physica B 163, 144 (1990).

  10. 10.

    M. R. Lees and B. R. Coles,J. Magn. Magn. Mat. 76 & 77, 173 (1988).

  11. 11.

    M. R. Lees, B. R. Coles, E. Bauer, and N. Pilmayr,J. Phys. C: Cond. Matt. 2, 6403 (1990).

  12. 12.

    T. Trappmann, Diploma Thesis, Universität Karlsruhe, 1991 (unpublished).

  13. 13.

    H. v. Löhneysen, A. Schröder, T. Trappmann, and M. Welsch,J. Magn. Magn. Mat. 108, 45 (1992).

  14. 14.

    S. Doniach,Physica 91B, 213 (1977).

  15. 15.

    A. K. Gangopadhyay, J. S. Schilling, E. Schuberth, P. Gutsmiedl, F. Gross, and K. Andres,Phys. Rev. B 38, 2603 (1988).

  16. 16.

    G. Fraunberger, B. Andraka, J. S. Kim, U. Ahlheim, and G. R. Stewart,Phys. Rev. B 40, 4735 (1989).

  17. 17.

    A. K. Gangopadhyay, K. Lettau, C. Lettau, J. S. Schilling, E. Schuberth, W. Fuchs, K. Andres, M. Damento, and K. A. Gschneidner Jr.,J. Magn. Magn. Mat. 103, 267 (1992).

  18. 18.

    T. Chattopadhyay, H. v. Löhneysen, T. Trappman, and M. Loewenhaupt,Z. Physik B 80, 159 (1990).

  19. 19.

    Alpha Ventron, Karlsruhe.

  20. 20.

    Ames Laboratory, Iowa State University, Ames, Iowa.

  21. 21.

    H. Asano, M. Umino, Y. Onuki, T. Komatsubara, F. Izumi, and N. Watanabe,J. Phys. Soc. Jpn. 55, 454 (1986); E. Gratz, E. Bauer, H. Nowotny, H. Mueller, S. Zemirli, and B. Barbara,J. Magn. Magn. Mat. 63 & 64, 312 (1987).

  22. 22.

    S. Ramakrishnan and G. Chandra,Proc. 5th Int. Conf. on Valence Fluctuations, L. C. Gupta and S. N. Malik, eds. (Bangalore, India, 1987), p. 401.

  23. 23.

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

  24. 24.

    Y. Onuki, Y. Shimizu, and T. Komatsubara,J. Phys. Soc. Jpn. 54, 304 (1985).

  25. 25.

    T. Sakakibara, T,. Goto, Y. Onuki, and T. Komatsubara,J. Magn. Magn. Mat. 70, 375 (1987). For details about crystal-field derived properties of CeCu6 see, e.g., S. Takayanagi, Y. Onuki, and T. Komatsubara,J. Phys. Soc. Jpn. 55, 2384 (1986); D. Weber, M. Yoshizawa, I. Kouroudis, B. Lüthi, and E. Walker,Europhys. Lett. 3, 827 (1987).

  26. 26.

    J.-M. Mignot, J.-L. Jacoud, L.-P. Regnault, J. Rossat-Mignod, P. Haen, P. Lejay, Ph. Boutrouille, B. Hennion, and D. Petitgrand,Physica B 163, 611 (1990).

  27. 27.

    We suspect that the assignment of the specific-heat curves forB‖a andB‖b was inadvertently interchanged in Ref. 3.

  28. 28.

    K. D. Schotte and U. Schotte,Phys. Lett. 55A, 38 (1975).

  29. 29.

    C. D. Bredl, F. Steglich, and K. D. Schotte,Z. Physik B 29, 327 (1978).

  30. 30.

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

  31. 31.

    A. S. Edelstein,Phys. Rev. B 37, 3808 (1988); A. S. Edelstein, B. N. Das, W. W. Fuller, B. Andraka, and G. R. Stewart,Physica B 163, 504 (1990).

  32. 32.

    J. Perenboom, H. van Kempern, A. Lacerda, P. Lejay, and J. Flouquet,Phys. Rev. B 44, 814 (1991).

  33. 33.

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

  34. 34.

    F. Steglich, U. Rauchschwalbe, U. Gottwick, H. M. Mayer, G. Sparn, N. Grewe, U. Poppe, and J. J. M. Franse,J. Appl. Phys. 57, 3054 (1985).

  35. 35.

    N. Andrei, K. Furuya, and J. H. Loewenstein,Rev. Mod. Phys. 55 331 (1983).

  36. 36.

    U. Walter, D. Wohlleben, and Z. Fisk,Z. Physik B 62, 325 (1986).

  37. 37.

    See, e.g., G. A. Baker,Quantitative Theory of Critical Phenomena (Academic Press, Boston, 1990).

  38. 38.

    M. E. Fisher and J. S. Langer,Phys. Rev. Lett. 20, 665 (1968).

  39. 39.

    S. V. Vonsovsky,Magnetism (Wiley, New York, 1974), Vol. 2, p. 1128.

  40. 40.

    A. Amato, D. Jaccard, E. Walker, and J. Flouquet,Solid State Commun. 55, 1131 (1985).

  41. 41.

    A. Sumiyama, Y. Oda, H. Nagano, Y. Onuki, K. Shibutani, and T. Komatsubara,J. Phys. Soc. Jpn. 55, 1294 (1986).

  42. 42.

    B. Welslau and M. Grewe,Physica B 165 & 166, 387 (1990).

  43. 43.

    F. Steglich, G. Sparn, R. Moog, S. Horn, A. Grauel, M. Lang, M. Nowak, A. Loidl, A. Krimmel, K. Knorr, A. P. Murani, and M. Tachiki,Physica B 163, 19 (1990); A. Loidl, A. Krimmel, K. Knorr, G. Sparn, M. Lang, C. Geibel, S. Horn, A. Grauel, F. Steglich, B. Welslau, N. Grewe, H. Nakotte, F. R. de Boer, and A. Murani,Ann. Physik 1, 78 (1992).

  44. 44.

    M. J. Besnus, A. Braghta, N. Hamaoui, and A. Mayer,J. Magn. Magn. Mat. 104–107, 1385 (1992).

  45. 45.

    M. Loewenhaupt, private communication; see also: B. Stroka, A. Schröder, T. Trappmann, H. v. Löhneysen, M. Loewenhaupt, and A. Severing,Z. Physik B, in press.

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Schlager, H.G., Schröder, A., Welsch, M. et al. Magnetic ordering in CeCu6−x Au x single crystals: Thermodynamic and transport properties. J Low Temp Phys 90, 181–204 (1993). https://doi.org/10.1007/BF00681999

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Keywords

  • Magnetic Field
  • Magnetic Material
  • Transport Property
  • Positive Contribution
  • Polycrystalline Sample