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The impact of Nd3+/La3+ substitution on the cation distribution and phase diagram in the La2SrAl2O7-Nd2SrAl2O7 system

I. A. Zvereva, E. A. Tugova, V. F. Popova, O. I. Silyukov, I. A. Minich

Abstract


The effect of isovalent cation substitution of lanthanum atoms in the structure of La2SrAl2O7 oxide, and phase equilibria (solidus-liquidus curves) in the binary system La2SrAl2O7-Nd2SrAl2O7 were studied. It was found that Nd3+ substitution for La3+ has effect on the structure of La2SrAl2O7 in respect of the character of cation distribution in the solid solution La2–xNdxSrAl2O7 from statistically disordered to the ordered one where strontium cations predominantly occupied the rock-salt layers, as reflected by the solidus-liquidus lines.


Keywords


perovskites; solid solutions; phase diagram

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References


Ohyama T, Ohashi N, Fukunaga O, Ikawa H, Izumi F, Tanaka J. Structural and electrical changes in Ln1.9Sr1.1−xCaxCu2O6+δ (Ln = La, Pr) systems. Phys C Supercond. 1995;249(3-4):293-303. doi:10.1016/0921-4534(95)00307-X

Maignan A, Simon C, Caignaert V, Raveau B. Size of the interpolated cation and hole carrier density: two key parameters for the optimisation of colossal magnetoresistive properties of Pr-based manganites. Zeitschrift für Phys B Condens Matter. 1995;99(3):305-10. doi:10.1007/s002570050041

Zvereva I, Zueva L, Choisnet J. Metastability of the K2NiF4 type structure of the solid solution LaCa(CrxAl-x)O4 (0

Zvereva I, Smirnov Y, Choisnet J. Prominent part of calcium ordering in the formation and stability of the intergrowth type solid solution La2Sr1−xCaxAl2O7. Int J Inorg Mater. 2001;3(1):95-100. doi:10.1016/S1466-6049(00)00099-4

Smirnov Y, Zvereva I, Choisnet J. X-Ray Diffraction Study of the Decomposition Process Occurring in Single Crystals of the K2NiF4-Type Aluminate LaCaAlO4. J Solid State Chem. 1997;134(1):132-7. doi:10.1006/jssc.1997.7557

Zvereva I, Smirnov Y, Choisnet J. Demixion of the K2NiF4 type aluminate LaCaAlO4: Precursor role of the local ordering of lanthanum and calcium. Mater Chem Phys. 1999;60(1):63-9. doi:10.1016/S0254-0584(99)00072-3

Ruddlesden SN, Popper P. The compound Sr3Ti2O7 and its structure. Acta Crystallogr. 1958;11(1):54-5. doi:10.1107/S0365110X58000128

Zvereva I, Smirnov Yu, Gusarov V, Popova V, Choisnet J. Complex aluminates RE2SrAl2O7 (RE = La, Nd, Sm-Ho): Cation ordering and stability of the double perovskite slab-rocksalt layer P2/RS intergrowth. Solid State Sci. 2003;5(2):343-9. doi:10.1016/S1293-2558(02)00021-3

Popova VF, Tugova EA, Zvereva IA, Gusarov VV. Phase Equilibria in the LaAlO3–LaSrAlO4 System. Glass Phys Chem. 2004;30(6):564-7. doi:10.1007/s10720-005-0014-z




DOI: http://dx.doi.org/10.15826/chimtech.2018.5.1.05

Copyright (c) 2017 Irina Zvereva, Ekaterina Tugova, Valentina Popova, Oleg Silyukov, Iana Minich

© Chimica Techno Acta, 2014-2019
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

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