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Phonon Resonances Induced by Pb in KCl Studied by Means of Thermal Conductivity and Ionic Thermocurrent Techniques

  • M. Locatelli
  • R. Cappelletti
  • E. Zecchi

Abstract

In order to study the evolution of Suzuki-like phase occlusions in KClPb (1), (2), by thermal conductivity measurements at low temperatures, we have to consider the phonon interactions with divalent ions Pb2+. These interactions were studied many times (3) and theoretical models were proposed. One model is based on one-phonon scattering due to the mass defect (4) with an extension proposed by M. WAGNER (5) to include two-phonon interactions. A second is based on one-phonon scattering due to force constant changes in the presence of a vacancy (6). In (3) J.W. SCHWARTZ et al. concluded that phonon scattering is mainly due the cationic vacancy; the divalent ion acts when its size differs from that of the host ion. Nevertheless they do not exclude the possibility of two-phonon processes as treated by M. WAGNER (5).

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References

  1. (1).
    M. Locatelli, R. Cappelletti, E. Zecchi, Correlated Thermal Conductivity and Ionic Thermocurrents Measurements to Study the Suzuki-like Phase Nucleation in KCl, paper presented at this conference.Google Scholar
  2. (2).
    R. Cappelletti, A. Gainotti, Journal de Physique, C7, 12 - 37, 316 (1976).Google Scholar
  3. (3).
    J.W. Schwartz and C.T. Walker, Phys. Rev. 155, 3, 959 (1967).ADSCrossRefGoogle Scholar
  4. (4).
    C.W. McCombie and J. Slater, Proc. Phys. Soc. (London) 84, 499 (1964).ADSCrossRefGoogle Scholar
  5. (5).
    H. Wagner, Phys. Rev. 131, 1433 (1963).ADSCrossRefGoogle Scholar
  6. (6).
    J.A. Krumhansl, in Proceedings at the International Conference on Lattice Dynamics, Copenhagen, 1963, edited by R.F. Wallis TTergamon Press, Inc., New York, 1965 ), p. 523.Google Scholar
  7. (7).
    R.O. Pohl, in Localized Excitations in Solids, edited by R.F. Wallis, ( Plenum Press, New York, 1968 ), p. 434.Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • M. Locatelli
    • 1
  • R. Cappelletti
    • 2
  • E. Zecchi
    • 2
  1. 1.L.C.P.,S.B.T.,C.E.N.G.Grenoble CedexFrance
  2. 2.Istituto di Fisica dell’UniversitàParmaItaly

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