Abstract
The experimental data on the spectra of elementary excitations measured by inelastic neutron scattering and on the heat capacity and the coefficient of thermal expansion are used to analyze the correlation between the spectral characteristics of the electron and phonon subsystems and the special features of the temperature dependence of the thermodynamic properties of a number of unstable valence Sm-and Ce-based compounds. The anomalous behavior of the thermodynamic properties of these compounds is defined by the special features of their phonon and electron (4f and conduction electrons) spectra. The rearrangement of the 4f-electron spectrum as a result of temperature variation plays a decisive part in the formation of temperature dependences of the heat capacity and the coefficient of thermal expansion of unstable valence systems.
Similar content being viewed by others
References
J. M. Lawrence, P. S. Riseborough, and R. D. Parks, Rep. Progr. Phys. 44, 24 (1981).
P. Wachter, in Handbook on the Physics and Chemistry of Rare Earth, Ed. by K. A. Gschneidner,Jr., L. Eyring, G. H. Lander, and G. R. Choppin (North-Holland, Amsterdam, 1994), Vol. 19, p. 177.
H.-G. Purwins, Ann. Phys. 7, 329 (1972).
E. Müller-Hartmann, Solid State Commun. 31, 113 (1979).
N. E. Bickers, D. L. Cox, and J. W. Wilkins, Phys. Rev. B 36, 2036 (1987).
A. S. Edelstein and N. C. Koon, Solid State Commun. 48, 269 (1983).
R. Pott, R. Schefzyk, D. Wohlleben, et al., Z. Phys. B: Condens. Matter 44, 17 (1981).
G. Creuzet and D. Gignoux, Phys. Rev. B 33, 515 (1986).
A. Lacerda, A. de Visser, P. Haen, et al., Phys. Rev. B 40, 8759 (1989).
R. Takke, M. Niksch, W. Assmus, et al., Z. Phys. B: Condens. Matter 44, 33 (1981).
J. M. Tarascon, Y. Isikawa, B. Chevalier, et al., J. Phys. (Paris) 41, 1135 (1980).
V. N. Lazukov, E. V. Nefedova, V. V. Sikolenko, et al., Fiz. Met. Metalloved. 93, 61 (2002).
J. M. Tarascon, Y. Isikawa, B. Chevalier, et al., J. Phys. (Paris) 41, 1141 (1980).
E. V. Nefedova, P. A. Alekseev, E. S. Klement’ev, et al., Zh. Éksp. Teor. Fiz. 115, 1024 (1999) [JETP 88, 565 (1999)].
D. Gignoux, F. Givord, R. Lemaire, et al., J. Less-Common Met. 94, 165 (1983).
V. N. Lazukov, P. A. Alekseev, E. S. Klement’ev, et al., Zh. Éksp. Teor. Fiz. 113, 1731 (1998) [JETP 86, 943 (1998)].
D. Mandrus, J. L. Sarrao, A. Lacerda, et al., Phys. Rev. B 49, 16809 (1994).
P. A. Alekseev, A. S. Ivanov, B. Dorner, et al., Europhys. Lett. 10, 457 (1989).
E. S. Clementyev, M. Braden, V. N. Lazukov, et al., Physica B (Amsterdam) 259–261, 42 (1999).
B. Gorshunov, N. Sluchanko, A. Volkov, et al., Phys. Rev. B 59, 1808 (1999).
N. E. Sluchanko, V. V. Glushkov, B. P. Gorshunov, et al., Phys. Rev. B 61, 9906 (2000).
S. Gabáni, K. Flachbart, E. Konovalova, et al., Solid State Commun. 117, 641 (2001).
S. Curnoe and K. A. Kikoin, Phys. Rev. B 61, 15714 (2000).
P. A. Alekseev, V. N. Lazukov, J.-M. Mignot, and I. P. Sadikov, Physica B (Amsterdam) 281–282, 34 (2000).
V. N. Lazukov, P. A. Alekseev, E. S. Clementyev, et al., Europhys. Lett. 33(2), 141 (1996).
S. Nakamura, T. Goto, M. Kasaya, and S. Kunii, J. Phys. Jpn. 60, 4311 (1991).
D. Gignoux, C. Vettier, and J. Voiron, J. Magn. Magn. Mat. 70, 388 (1987).
I. V. Berman, N. B. Brant, V. V. Moshchalkov, et al., Pis’ma Zh. Éksp. Teor. Fiz. 38, 393 (1983) [JETP Lett. 38, 477 (1983)].
P. A. Alekseev, J.-M. Mignot, V. N. Lazukov, et al., J. Solid State Chem. 133, 230 (1997).
J. Röhler, in Handbook on the Physics and Chemistry of Rare Earth, Ed. by K. A. Gschneidner, Jr., L. Eyring, and S. Hüfner (North-Holland, Amsterdam, 1987), Vol. 10, p. 453.
Author information
Authors and Affiliations
Additional information
__________
Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 123, No. 6, 2003, pp. 1266–1275.
Original Russian Text Copyright © 2003 by Nefedova, Alekseev, Lazukov, Sadikov.
Rights and permissions
About this article
Cite this article
Nefedova, E.V., Alekseev, P.A., Lazukov, V.N. et al. The thermodynamic properties and special features of spectra of elementary excitations of unstable valence Sm-and Ce-based compounds. J. Exp. Theor. Phys. 96, 1113–1121 (2003). https://doi.org/10.1134/1.1591222
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1591222