Abstract
The phonon spectra g(ν) of rare-earth hexaborides MeB3 are calculated both in the approximation MeB* + B (B* = B6) without regard for bonding between metal and boron atoms and in the approximation making allowance for this bonding. The temperature dependences of the heat capacity are calculated from the dependences g(ν), and the results obtained are compared with the experimental data in the range 5–300 K. It is found that stretching vibrations in the metal and boron sublattices and between these sublattices variously affect the thermodynamic functions of hexaborides at low and high temperatures.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. Emsley, The Elements (Clarendon Press, Oxford, 1989; Mir, Moscow, 1993).
G. V. Samsonov, T. I. Serebryakova, and V. A. Neronov, Borides (Atomizdat, Moscow, 1975).
V. V. Novikov, Fiz. Tverd. Tela (St. Petersburg) 43(2), 289 (2001) [Phys. Solid State 43, 300 (2001)].
S. Kunii, J. Phys. Soc. Jpn. 57, 361 (1998).
J. Delaunay, Solid State Phys. 2, 219 (1956).
S. L. Upadhyaya, J. L. Upadhyaya, and R. Shyam, Phys. Rev. B 44(1), 122 (1991).
N. N. Sirota, I. M. Sirota, T. M. Soshnina, and T. D. Sokolovskii, Dokl. Akad. Nauk 373(6), 750 (2000) [Dokl. Phys. 45, 380 (2000)].
R. Furth, Proc. R. Soc. London, Ser. A 193, 87 (1994).
S. Nakamura, T. Goto, S. Kunii, et al., J. Phys. Soc. Jpn. 67(2), 623 (1994).
N. N. Sirota, V. V. Novikov, and A. V. Novikov, Fiz. Tverd. Tela (St. Petersburg) 42(11), 2033 (2000) [Phys. Solid State 42, 2093 (2000)].
Physicochemical Properties of Elements: A Handbook, Ed. by G. V. Samsonov (Naukova Dumka, Kiev, 1965).
L. A. Reznitskii, Zh. Fiz. Khim. 61(7), 1800 (1987).
S. V. M. Meshel and O. J. Klepa, J. Alloys Compd. 221, 37 (1995).
L. A. Reznitskii, Zh. Fiz. Khim. 68(5), 945 (1994).
L. A. Reznitskii, Zh. Fiz. Khim. 71(4), 765 (1997).
Author information
Authors and Affiliations
Additional information
__________
Translated from Fizika Tverdogo Tela, Vol. 44, No. 5, 2002, pp. 930–934.
Original Russian Text Copyright © 2002 by N. Sirota, Novikov, I. Sirota, Sokolovski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \).
Rights and permissions
About this article
Cite this article
Sirota, N.N., Novikov, V.V., Sirota, I.M. et al. Phonon spectra and thermodynamic properties of rare-earth hexaborides. Phys. Solid State 44, 972–977 (2002). https://doi.org/10.1134/1.1477501
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1477501