Abstract
The thermal conductivity and electrical resistivity are measured in the temperature range 160–300 K for two compositions of the “golden” phase of the Sm1−x GdxS system with x=0.14 and 0.3, in which a homogeneous variable valence of samarium ions is observed. It is found that, in this temperature range, the experimentally obtained Lorentz number L appearing in the electron component of thermal conductivity for these compositions exceeds the theoretical Sommerfeld value L 0=2.45×10−8 WΩ/K2 typical of metals and highly degenerate semiconductors. It is also proved that the value of L increases with temperature in the interval 160–300 K starting from 160 K. A theoretical model capable of explaining the obtained experimental results is discussed.
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References
A. Jayaraman, E. Bucher, P. Dernier, and L. D. Longinotti, Phys. Rev. Lett. 31(11), 700 (1973).
A. V. Golubkov, L. S. Parfen’eva, I. A. Smirnov, et al., Fiz. Tverd. Tela (St. Petersburg) 41(1), 26 (1999) [Phys. Solid State 41 (1), 22 (1999)].
V. A. Shaburov, A. I. Egorov, G. A. Krutov, et al., Zh. Éksp. Teor. Fiz. 68(1), 326 (1975) [Sov. Phys. JETP 41, 158 (1975)].
A. I. Egorov, E. V. Petrovich, Yu. P. Smirnov, et al., Izv. Akad. Nauk SSSR, Ser. Fiz. 40(2), 395 (1976).
I. A. Smirnov and V. S. Oskotskii, Usp. Fiz. Nauk 124(2), 241 (1978) [Sov. Phys. Usp. 21, 117 (1978)].
D. I. Khomskii, Usp. Fiz. Nauk 129(3), 443 (1979) [Sov. Phys. Usp. 22, 879 (1979)].
A. Jayaraman, P. Dernier, and L. D. Longinotti, Phys. Rev. B 11(8), 2783 (1975).
M. Ohashi, T. Kaneko, H. Yoshido, and S. Abe, Physica B 86–88, 224 (1977).
S. P. Nikanorov, Yu. A. Burenkov, A. B. Lebedev, et al., Phys. Status Solidi A 105, K103 (1988).
Yu. A. Burenkov, A. V. Golubkov, V. V. Zhdanova, et al., Fiz. Tverd. Tela (Leningrad) 33(8), 2350 (1991) [Sov. Phys. Solid State 33 (8), 1322 (1991)].
A. Jayaraman, V. Narayanamurti, E. Bucher, and R. G. Maines, Phys. Rev. Lett. 25, 368 (1970).
I. L. Aptekar’, V. I. Rashchupkin, and E. Yu. Tonkov, Fiz. Tverd. Tela (Leningrad) 23(6), 1589 (1981) [Sov. Phys. Solid State 23 (6), 930 (1981)].
V. I. Rashchupkin, I. L. Aptekar’, V. K. Gartman, and E. Yu. Tonkov, Fiz. Tverd. Tela (Leningrad) 20(3), 799 (1978) [Sov. Phys. Solid State 20 (3), 463 (1978)].
B. A. Abdikamalov, I. L. Aptekar’, V. M. Sergeeva, and E. Yu. Tonkov, Fiz. Tverd. Tela (Leningrad) 21(1), 187 (1979) [Sov. Phys. Solid State 21 (1), 108 (1979)].
I. A. Smirnov, J. Phys. Colloq. 41(6), 143 (1980).
A. V. Golubkov, A. I. Egorov, T. S. Orlova, et al., Fiz. Tverd. Tela (Leningrad) 29(12), 3683 (1987) [Sov. Phys. Solid State 29 (12), 2107 (1987)].
A. V. Golubkov, V. M. Egorov, T. S. Orlova, et al., Phys. Status Solidi A 105, K93 (1988).
E. V. Shadrichev, L. S. Parfen’eva, V. I. Tamarchenko, et al., Fiz. Tverd. Tela (Leningrad) 18(8), 2380 (1976) [Sov. Phys. Solid State 18 (8), 1388 (1976)].
O. V. Farberovich, Fiz. Tverd. Tela (Leningrad) 21(11), 3434 (1979) [Sov. Phys. Solid State 21 (11), 1982 (1979)].
A. V. Golubkov, T. B. Zhukova, and V. M. Sergeeva, Izv. Akad. Nauk SSSR, Neorg. Mater. 2(11), 77 (1966).
A. V. Golubkov and V. M. Sergeeva, Preprint of Institute of Metal Physics, UNTS AN SSSR (Sverdlovsk, 1977).
A. Jezowski, J. Mucha, and G. Pompe, J. Phys. D: Appl. Phys. 20, 1500 (1987).
V. S. Oskotskii and I. A. Smirnov, in Rare-Earth Semiconductors, Ed. by V. P. Zhuze and I. A. Smirnov (Nauka, Leningrad, 1977).
V. P. Zhuze, E. V. Goncharova, N. F. Kartenko, et al., Phys. Status Solidi A 18, 63 (1973).
V. S. Oskotskii and I. A. Smirnov, Defects in Crystals and Thermal Conduction (Nauka, Leningrad, 1972).
A. V. Goltsev and G. Bruls, submitted to Phys. Rev. B.
S. Von Molnar, T. Penney, and F. Holtzberg, J. Phys. Colloq. 37(10), 241 (1976).
S. D. Bader, N. E. Phillips, and D. B. McWhan, Phys. Rev. B 7, 4686 (1973).
V. I. Belitsky and A. V. Goltsev, Physica B 172, 459 (1991).
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Translated from Fizika Tverdogo Tela, Vol. 42, No. 6, 2000, pp. 986–991.
Original Russian Text Copyright © 2000 by Golubkov, Gol’tsev, Parfen’eva, Smirnov, Miserek, Mucha, Jezowski.
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Golubkov, A.V., Gol’tsev, A.V., Parfen’eva, L.S. et al. Thermal conductivity and Lorentz number of the “Golden” phase of the Sm1−x GdxS system with homogeneous variable valence of samarium. Phys. Solid State 42, 1017–1022 (2000). https://doi.org/10.1134/1.1131340
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DOI: https://doi.org/10.1134/1.1131340