Evolution of Iron Electronic State in the Solid Solutions Gd2-xSr1+xFe2O7-δ


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The present study is devoted to the non-isovalent substitution of Gd+3 for Sr+2 in matrix of Gd2-xSr1+xFe2O7 with perovskite-type intergrowth structure and to the investigation of oxidation state of iron depending on the method of synthesis and the content of solid solutions. Mössbauer spectroscopy showed the difference in the structure of complex ferrite Gd2SrFe2O7 obtained by ceramic technology (iron in single Fe+3 magnetically ordered state) from oxides obtained by the sol - gel technology (Fe+3 in the three different surroundings and presence of Fe+4).



Solid State Phenomena (Volume 194)

Edited by:

Yuriy Verbovytskyy and António Pereira Gonçalves




A. Shilova et al., "Evolution of Iron Electronic State in the Solid Solutions Gd2-xSr1+xFe2O7-δ", Solid State Phenomena, Vol. 194, pp. 116-119, 2013

Online since:

November 2012




[1] Y. Takeda, K. Kanno, T. Takada, O. Yamamoto, M. Takano, N. Nakayama, Y. Bando, Phase relation in the oxygen nonstoichiometric system, SrFeOx (2. 5 ≤ x ≤ 3. 0) J. Solid State Chem. 63 (2) 1986 237–249.

DOI: https://doi.org/10.1016/0022-4596(86)90174-x

[2] A. Fossdal, M. –A. Einarsrud, T. Grande Phase equilibria in the pseudo–binary system SrO–Fe2O3 Journal of Solid State Chemistry 177 (2004) 2933–2942.

DOI: https://doi.org/10.1016/j.jssc.2004.05.007

[3] I. V. Chislova, A. A. Matveeva, A. V. Volkova, and I. A. Zvereva Sol–Gel Synthesis of Nanostructured Perovskite_Like Gadolinium Ferrites , Glass Phys. Chem., 2011, Vol. 37 No. 6 pp.653-660.

DOI: https://doi.org/10.1134/s1087659611060071

[4] I. A. Zvereva, I. V. Otrepina, V. G. Semenov, E. A. Tugova, V. F. Popova, and V. V. Gusarov. Mechanism of Formation of the Complex Oxide Gd2SrFe2O7. Russ. J. Gen. Chem., 2007, vol. 77, no. 6 p.973–978.

DOI: https://doi.org/10.1134/s1070363207060011

[5] I.B. Sharma, D. Singh, S.K. Magotra. Effect of substitution of magnetic rare earths for La on the structure electrical transport and properties of La2SrFe2O7 / Journal of Alloys Compaund. –1998. – №269. – p.13 – 16.

DOI: https://doi.org/10.1016/s0925-8388(98)00153-4