Abstract
YFe1-xСоxO3 solid solutions were prepared by glycerol-nitrate technique. The homogeneity range of solid solutions was studied within the temperature range 1173 – 1573 K. A continues series of solid solution below the decomposition temperature of YСоO3, which was shown to be equal to 1266 ± 6 K, begins to narrow at higher temperatures and becomes equal to 0 ≤ x ≤ 0.1 at 1573 K. The phase diagram of the YFeO3 – YСoO3 system in the “T – composition” coordinates was divided into three fields. Similar to the parent ternary oxides, all single-phase YFe1-xСоxO3 solid solutions possess orthorhombically distorted perovskite structure (Pnma space group). Unusual behavior of orthorhombic distortions in YFe1-xСоxO3 with temperature was explained by probable changes in spin state of Co3+ ions.
Highlights
IntroductionYttrium ferrite and yttrium cobaltite with the perovskite structure and their mixed derivates attract much attention due to a set of electrical and magnetic properties [1,2,3,4,5,6,7,8,9,10,11,12]
Yttrium ferrite and yttrium cobaltite with the perovskite structure and their mixed derivates attract much attention due to a set of electrical and magnetic properties [1,2,3,4,5,6,7,8,9,10,11,12]. Their structural features and some functional properties were widely studied [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16], there is lack information concerning phase equilibria and homogeneity ranges of YFe1-xСоxO3 solid solutions
Yttrium ferrite quenched from high temperature within the entire range (1173 – 1473 K) or slowly cooled to room temperature (RT) possesses orthorhombically distorted perovskite structure, which is in good agreement with the results reported earlier [1,2,3,4]
Summary
Yttrium ferrite and yttrium cobaltite with the perovskite structure and their mixed derivates attract much attention due to a set of electrical and magnetic properties [1,2,3,4,5,6,7,8,9,10,11,12] Their structural features and some functional properties were widely studied [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16], there is lack information concerning phase equilibria and homogeneity ranges of YFe1-xСоxO3 solid solutions. The aim of present work was determination of homogeneity ranges of YFe1-xСоxO3 solid solutions as a function of temperature in air and establishing of phase equilibria in the YFeO3 – YСoO3 system
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