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HomeSolid State PhenomenaSolid State Phenomena Vol. 230Structural Behaviour of EuCoO3 and Mixed...

Structural Behaviour of EuCoO₃and Mixed Cobaltites-Ferrites EuCo₁₋_xFe_xO₃

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Abstract:

Crystal structure of the mixed cobaltites-ferrites EuCo₁₋_xFe_xO₃, obtained by solid state reaction in air at 1573 K, has been studied by means of X-ray powder diffraction technique. It was found that all samples synthesized adopt orthorhombic perovskite structure. Obtained values of structural parameters indicate formation of continuous solid solution in the EuCoO₃−EuFeO₃system. Thermal behaviour of the EuCoO₃ structure has been investigated in the temperature range of 298–1173 K by means of in situ high-resolution powder diffraction technique applying synchrotron radiation. Strong anomalies in the lattice expansion have been detected between 580 K and 800 K, which are evidently connected with the transitions of Co³⁺ ions to the higher spin states and further metal-insulator transition occurred in EuCoO₃ at about 600 K.

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Periodical:

Solid State Phenomena (Volume 230)

Pages:

31-38

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.230.31

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Online since:

June 2015

Authors:

Olia Pekinchak, Leonid Vasylechko*, Vasyl Berezovets, Yurii Prots

Keywords:

Crystal Structure, Mixed Cobaltites-Ferrites, Perovskites, Solid Solution, Thermal Expansion

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