Perovskite manganites and layered cobaltites: potential materials for thermoelectric applications

Maignan, A.; Hébert, S.; Pi, Li; Pelloquin, D.; Martin, C.; Michel, C.; Hervieu, M.; Raveau, B.

doi:10.1016/s1463-0184(02)00048-5

Cited by 102 publications

(71 citation statements)

References 16 publications

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“…Koshibae et al 18) theoretically demonstrated that the magnitude of S at a constant temperature monotonically decreases with the concentration of Co 4+ in the Co 3+ -Co 4+ mixed valent low-spin cobaltate systems. Followingly, Maignan et al 19) experimentally confirmed in various cobaltates that the magnitude of both S and ρ at a particular temperature decreases with increasing Co 4+ , being equivalent to the hole concentration, determined on the basis of the charge balance of chemical formula of the samples. Hence, the nominal valence state of Co ions can be a major of the hole concentration in layered cobaltates.…”

Section: Jcs-japanmentioning

confidence: 94%

Synthesis, crystal structure and physical properties of layered cobalt oxide CaxCoO2 (x- 0.47)

Miyazaki

Huang

Kajiwara

et al. 2009

J. Ceram. Soc. Japan

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Section: Jcs-japanmentioning

confidence: 94%

Synthesis, crystal structure and physical properties of layered cobalt oxide CaxCoO2 (x- 0.47)

Miyazaki

Huang

Kajiwara

et al. 2009

J. Ceram. Soc. Japan

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“…Additionally, useful material properties such as temperature-induced metal-insulator transitions and thermoelectricity have been reported as well [4][5][6][7][8][9]. In the work presented here we study microwave (MW) -assisted synthesis of the RE cobaltites (RE)CoO3 (RE = La -Dy) series in order to demonstrate the feasibility of the MW technique for this class of materials.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis, Microstructure, and Magnetic Properties of Rare-Earth Cobaltites

et al. 2016

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Citation for published item:quti¡ errez eij sD tuli nd r doEqonj lD tes¡ us nd ¡ evil fr ndeD h vid nd erryD s n nd wor¡ nD imilio nd hmidtD iner @PHIUA 9wi row veE ssisted synthesisD mi rostru tureD nd m gneti properties of r reEe rth o ltitesF9D snorg ni hemistryFD ST @IAF ppF TPUETQQF Further information on publisher's website:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Inorganic Chemistry, copyright c 2016 American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see https://doi.org/10.1021/acs.inorgchem.6b02557. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThe series of perovskite rare-earth (RE) doped cobaltites (RE)CoO3 (RE = La -Dy) was prepared by microwave-assisted synthesis. The crystal structure undergoes a change of symmetry depending on the size of the RE cation. LaCoO3 is rhombohedral, S.G. , while for the rest of the RE series (Pr -Dy) the symmetry is orthorhombic, S.G. Pnma (No. 62). The crystal structure obtained by X-Ray diffraction was confirmed by high resolution transmission electron microscopy, which yielded a good match between experimental and simulated images. It is further shown that the well-known magnetism in LaCoO3, which involves a thermally induced Co 3+ (d 6 ) low spin to intermediate or high spin state transition, is strongly modified by RE-doping and a rich variety of magnetic order has been detected across the series.

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“…The latter emphasizes a strong necessity in seeking highly performing n-type thermoelectric oxides. Among oxides, manganates 10,11 and strontium titanate SrTiO 3 , 12,13 having perovskite-type lattice are considered promising thermoelectric materials. However, the bulk thermoelectric performance of pure SrTiO 3 is low, with wide band-gap and relatively high lattice thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of thermoelectric performance in strontium titanate by praseodymium substitution

Kovalevsky

Yaremchenko

Populoh

et al. 2013

Journal of Applied Physics

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In order to identify the effects of Pr additions on thermoelectric properties of strontium titanate, crystal structure, electrical and thermal conductivity, and Seebeck coefficient of Sr1−xPrxTiO3 (x = 0.02–0.30) materials were studied at 400 < T < 1180 K under highly reducing atmosphere. The mechanism of electronic transport was found to be similar up to 10% of praseodymium content, where generation of the charge carriers upon substitution resulted in significant increase of the electrical conductivity, moderate decrease in Seebeck coefficient, and general improvement of the power factor. Formation of point defects in the course of substitution led to suppression of the lattice thermal conductivity, whilst the contribution from electronic component was increasing with carrier concentration. Possible formation of layered structures and growing distortion of the perovskite lattice resulted in relatively low thermoelectric performance for Sr0.80Pr0.20TiO3 and Sr0.70Pr0.30TiO3. The maximum dimensionless figure of merit was observed for Sr0.90Pr0.10TiO3 and amounted to ∼0.23 at 670 K and ∼0.34 at 1170 K, close to the values, obtained in similar conditions for the best bulk thermoelectrics, based on rare-earth substituted SrTiO3.

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Perovskite manganites and layered cobaltites: potential materials for thermoelectric applications

Cited by 102 publications

References 16 publications

Synthesis, crystal structure and physical properties of layered cobalt oxide CaxCoO2 (x- 0.47)

Synthesis, crystal structure and physical properties of layered cobalt oxide CaxCoO2 (x- 0.47)

Microwave-Assisted Synthesis, Microstructure, and Magnetic Properties of Rare-Earth Cobaltites

Enhancement of thermoelectric performance in strontium titanate by praseodymium substitution

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