This article is cited in 3 papers

Phase transitions

Properties of the ceramic manganite (La$_{0.65}$Ca$_{0.35}$)$_{1-x}$Mn$_{1+x}$O$_{3\pm\Delta}$ ($x$ = 0.2) sintered at temperatures of 1000–1450$^\circ$C

G. Ya. Akimov, A. A. Novokhatska, Yu. F. Revenko

Galkin Donetsk Institute for Physics and Engineering, Donetsk

Abstract: It has been shown that the ceramics (La$_{0.65}$Ca$_{0.35}$)$_{1-x}$Mn$_{1+x}$O$_{3\pm\Delta}$ ($x$ = 0.2) sintered at temperatures up to 1450$^\circ$C is formed as a composite material consisting of manganite and manganese oxide grains. It has been found that, at a sintering temperature of 1450$^\circ$C, the manganite grain size abruptly increases, which is accompanied by the formation of a nanometer-sized layered structure. It has been revealed for the first time that the temperature dependence of the magnetoresistance of the ceramic manganite with this structure is characteristic of single crystals.

Received: 04.03.2014

 English version: Physics of the Solid State, 2014, 56:9, 1886–1888

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