Abstract
Tetragonal single crystals of the nonstoichiometric strontium ferrate with the lattice parameters a = 3.8525(3) and c = 3.8781 (3) Å have been synthesized for the first time by the method of floating-zone melting in the SrFeOx system. The neutron diffraction patterns of the crystals showed weak additional reflections indicating the formation of the superstructure with double spacing along the [hh0] direction. The Mössbauer spectra of the crystals were obtained and measured in the temperature range 80–300 K. It was established that below the temperature T N = 232(1) K, the crystals are in the magnetically ordered state with 3/5 of iron ions being in the trivalent state and all the remaining iron ions in the tetravalent state. This leads to the crystal composition SrFeO2.71. The electric resistivity of the crystals equal to 100 ω cm at room temperature drastically decreases at temperatures exceeding 470 K.
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G. A. Smolenskii, V. A. Bokov, V. A. Isupov, N. N. Krainik, R. E. Pasynkov, and M. S. Shur, Ferro-and Antiferroelectrics (Nauka, Leningrad, 1971).
K. S. Aleksandrov and B. V. Beznosikov, Perovskite-like Crystals (Nauka, Sib. Predpriyatie Ross. Akad. Nauk, 1997), p. 27.
U. Bakachandran, J. T. Dusek, S. M. Sweeney, et al., Am. Ceram. Soc. Bull. 74, 71 (1995).
Y. S. Liu and Y. Zeng, J. Catal. 164, 220 (1996).
U. Balachandran, J. T. Dusek, P. S. Maiya, et al., Catal. Today 36, 265 (1997).
P. K. Gallagher, J. B. MacChesney, and D. N. E. Buchanan, J. Chem. Phys. 41, 2429 (1964).
J. B. MacChesney, R. C. Sherwood, and J. F. Potter, J. Chem. Phys. 43, 1907 (1965).
T. Takeda, Y. Yamaguchi, and H. Watanabe, J. Phys. Soc. Jpn. 23, 967 (1972).
T. Takeda, Y. Yamaguchi, Y. Watanabe, et al., J. Phys. Soc. Jpn. 26, 320 (1969).
C. Greaves, A. J. Jacobson, B. C. Tofield, and B. E. F. Fender, Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem. 31, 641 (1975).
M. Harder and H. Mueller-Buschbaum, Z. Anorg. Allg. Chem. 464, 169 (1980).
B. C. Tofield, C. Greaves, and B. E. F. Fender, Mater. Res. Bull. 10, 737 (1975).
J.-C. Granier, N. Ea, M. Pouchard, and P. Hagenmuller, J. Solid State Chem. 58, 243 (1985).
T. C. Gibb, J. Chem. Soc. Dalton Trans., 1455 (1985).
Y. Takeda, K. Kanno, T. Takada, et al., J. Solid State Chem. 63, 237 (1986).
M. Takano, T. Okita, M. Nakayama, et al., J. Solid State Chem. 73, 140 (1988).
T. I. Vetrova, Tszi Shishan’, and A. V. Vishnyakov, Zh. Fiz. Khim. 72, 253 (1998).
A. M. Balbashov, S. K. Egorov, et al., J. Crystal. Growth 52, 498 (1981).
D. Georgiev, V. V. Nietz, T. B. Petukhova, et al., J. Neutron Res. 5, 109 (1997).
V. I. Iveronova and G. P. Revkevich, Theory of X-ray Scattering (Mosk. Gos. Univ., Moscow, 1978, 2nd ed.), Chap. 7.
V. I. Nikolaev and V. S. Rusakov, Mössbauer Studies of Ferrites (Mosk. Gos. Univ., Moscow, 1985).
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Translated from Kristallografiya, Vol. 45, No. 5, 2000, pp. 804–808.
Original Russian Text Copyright © 2000 by Bush, Sarin, Georgiev, Cherepanov.
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Bush, A.A., Sarin, V.A., Georgiev, D.G. et al. Synthesis, X-ray and neutron diffraction and Mössbauer studies of SrFeOx crystals. Crystallogr. Rep. 45, 734–738 (2000). https://doi.org/10.1134/1.1312911
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DOI: https://doi.org/10.1134/1.1312911