Structural behaviour of continuous solid solution SmCo1-xFexO3

Kharko, O.V.; Vasylechko, L.; Ubizskii, S.; Pashuk, A.; Prots, Yurii

doi:10.15407/fm21.02.226

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…The room-temperature lattice parameters are consistent with the literature data from [25,26], but somewhat differ from the data for SmCoO3 reported in [27]. The maximum similarity with the data obtained in [11] is observed.…”

Section: Resultssupporting

confidence: 81%

Thermoelectric properties of the SmCoO3 and NdCoO3 cobalt oxides

Дудников

Федоров

Orlov

et al. 2020

Ceramics International

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The thermoelectric properties of the NdCoO3 and SmCoO3 rare-earth cobalt oxides with a perovskite structure have been investigated in a wide temperature range. It is shown that, in the low-temperature region, the thermal conductivity of the compounds has a sharp maximum and the electrical conductivity of the samples increases with temperature, whereas the Seebeck coefficient behaves nonmonotonically with increasing temperature. The SmCoO3 oxide is characterized by the positive thermopower over the entire investigated range with a sharp growth in the low-temperature region, attaining the maximum value (S ≈ 1000 µV/K) near room temperature, and a further decrease. It has been established that, in the NdCoO3 oxide, the Seebeck coefficient changes its sign, which was rarely observed in the La-based compounds and is atypical of the undoped rare-earth cobalt oxides. The thermopower maximum obtained at a temperature of 450 K is 400 µV/K. The regions of the fastest growth of the thermoelectric power factor correspond to the anomalies caused by the spin transition of Со 3+ ions and the dielectricmetal transition.

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Section: Resultssupporting

confidence: 81%

Thermoelectric properties of the SmCoO3 and NdCoO3 cobalt oxides

Дудников

Федоров

Orlov

et al. 2020

Ceramics International

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“…(1) The temperature dependences of volume expansion coefficient for NdCoO3, SmCoO3, and GdCoO3 arepresented in Figure 2. The room temperature structural characteristics are consistent with other data available [41,42]. The crystal lattice parameters at various temperatures are summarized in Table 1.…”

Section: X-ray Phase and X-ray Diffraction Analysissupporting

confidence: 87%

Effect of Multiplicity Fluctuation in Cobalt Ions on Crystal Structure, Magnetic and Electrical Properties of NdCoO3 and SmCoO3

et al. 2020

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The structural, magnetic, electrical, and dilatation properties of the rare-earth NdCoO3 and SmCoO3 cobaltites were investigated. Their comparative analysis was carried out and the effect of multiplicity fluctuations on physical properties of the studied cobaltites was considered. Correlations between the spin state change of cobalt ions and the temperature dependence anomalies of the lattice parameters, magnetic susceptibility, volume thermal expansion coefficient, and electrical resistance have been revealed. A comparison of the results with well-studied GdCoO3 allows one to single out both the general tendencies inherent in all rare-earth cobaltites taking into account the lanthanide contraction and peculiar properties of the samples containing Nd and Sm.

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“…Select diffraction patterns over the entire temperature range were indexed by the SVDIndex algorithm (Coelho 2003) in TOPAS (Bruker AXS 2014) and were all found to be consistent with the orthorhombic space-group Pnma, as has been found in previous room-temperature studies (Kharko et al 2014;Pérez-Cacho et al 2000;Tu et al 1997). There were several unidentified minor impurity peaks present, but they were able to be discounted, as their thermal expansion behaviour was markedly different to that of the main perovskite phase.…”

Section: Resultsmentioning

confidence: 72%

“…The room-temperature structure of the SSC end-member, SmCoO 3 , has been studied previously in the context of solid-solution series with Ni (Pérez-Cacho et al , 2000), Fe (Kharko et al , 2014), and Sr (Tu et al , 1997), which, in all cases, was reported as the orthorhombic Pbnm space-group [standard setting Pnma , no. 62 (Hahn, 1995)].…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent structural behaviour of samarium cobalt oxide

et al. 2017

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The crystal structure and thermal expansion of the perovskite samarium cobalt oxide (SmCoO3) have been determined over the temperature range 295–1245 K by Rietveld analysis of X-ray powder diffraction data. Polycrystalline samples were prepared by a sol–gel synthesis route followed by high-temperature calcination in air. SmCoO3 is orthorhombic (Pnma) at all temperatures and is isostructural with GdFeO3. The structure was refined as a distortion mode of a parent $ Pm{\bar 3}m $ structure. The thermal expansion was found to be non-linear and anisotropic, with maximum average linear thermal expansion coefficients of 34.0(3) × 10−6, 24.05(17) × 10−6, and 24.10(18) × 10−6 K−1 along the a-, b-, and c-axes, respectively, between 814 and 875 K.

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Structural behaviour of continuous solid solution SmCo1-xFexO3

Cited by 8 publications

References 26 publications

Thermoelectric properties of the SmCoO3 and NdCoO3 cobalt oxides

Thermoelectric properties of the SmCoO3 and NdCoO3 cobalt oxides

Effect of Multiplicity Fluctuation in Cobalt Ions on Crystal Structure, Magnetic and Electrical Properties of NdCoO3 and SmCoO3

Temperature-dependent structural behaviour of samarium cobalt oxide

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