Crystal Structure, Thermal Expansion, and Electrical Properties
of Layered Oxides LnBa(Fe, Co, Cu)₂O₅₊ (Ln = Nd, Sm, Gd)

A. I. Klyndyuk and E. A. Chizhova

Belarusian State Technological University, ul. Sverdlova 13, Minsk, 220006 Belarus

e-mail: kai_17@rambler.ru

Received February 19, 2013

Abstract—LnBaFe_0.5Co_0.5CuO₅₊ and LnBaFeCo_0.5Cu_0.5O₅₊ solid solutions (Ln = Nd, Sm, Gd) are synthe-
sized by the solid-phase method; their structural parameters and oxygen nonstoichiometry are determined; and
the thermal expansion, conductivity, and thermal emf of these crystals are investigated. The thermal expansion
coefficient of sintered ceramics and its electric transport parameters are calculated. The influence of the nature
of rare-earth elements (REE) and 3d metal on the crystal structure, oxygen nonstoichiometry, and physicochem-
ical properties of layered oxides LnBa(Fe, Co, Cu)₂O₅₊ are analyzed.

Keywords: perovskites, layered oxides, thermal expansion, electrical conductivity, thermal emf

DOI: 10.1134/S108765961401012X

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