A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3−x□xCoO3 cobaltites

Amor, A. Ben; Koubàa, Mohamed; Cheikhrouhou‐Koubaa, W.; Cheikhrouhou, A.

doi:10.1016/j.jallcom.2007.12.030

Cited by 8 publications

(1 citation statement)

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“…LaCoO 3 is a nonmagnetic insulator in its ground state. Partial substitution of the trivalent La 3+ site by divalent metal ions; for example, Ca 2+ , Ba 2+ , or Sr 2+ , results in a change in the oxidation state of Co metal ions, the creation of oxygen vacancies, or both, in order to maintain the charge neutrality of the compound [15][16][17]. Thus, doped rare-earth cobaltate materials have the potential to exhibit "mixed conductivity" (i.e.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, and measurement of structural and magnetic properties, of La1−xCdxCoO3 perovskite ceramic oxides

2009

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Perovskite-type Cd-doped LaCoO 3 materials were synthesized by a simple solution-based combustion process. The synthesized materials were characterized by powder Xray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance (DR) in the UV-VIS, and magnetic property measurements. The parent LaCoO 3 compound showed spin-glass transition at low temperatures, and with progressive Cd doping, showed transition to paramagnetic ordering. The changes in magnetic properties of the materials are correlated to the changes in structural features resulting from the Rietveld structural refinement of the materials.

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Section: Introductionmentioning

confidence: 99%

Synthesis, and measurement of structural and magnetic properties, of La1−xCdxCoO3 perovskite ceramic oxides

2009

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Effect of Y-doping on the transport and magnetic properties of La0.5Sr0.5CoO3 and La0.7Sr0.3CoO3

et al. 2012

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Structural Magnetic and Electrical Properties in Nd-Doped Manganites (La0.70−x Nd x )Sr0.30Mn0.70Ti0.30O3 with 0 ≤ x ≤ 0.30

Abassi

Kallel

et al. 2014

J Supercond Nov Magn

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International audienceThe structural, magnetic and electrical properties of (La0.70−xNdx)Sr0.30Mn0.70Ti0.30 O 3 perovskites (0 ≤ x ≤ 0.30) prepared by the usual ceramic procedure were investigated. Structural Rietveld refinements of the X-ray powder diffraction revealed that for x = 0 the compound crystallizes in a rhombohedral (R 3¯ c) perovskite structure, while for x = 0.10, 0.20 and 0.30 the structure becomes orthorhombic (Pbnm). The field-cooled, zero-field-cooled and M(H) measurements lead to conclude that the samples with x≥0.10 behave like spin-glass systems. The temperature dependence of the resistivity exhibits two transitions at two temperatures T p1 and T p2, with the same width for the two peaks. T P1 results from the competition between double-exchange and super-exchange mechanisms inside the grain (intrinsic effects) whereas T P2 arises due to the grain boundary effects (extrinsic effect). The resistivity of this system seems to be related to the competition between antiferromagnetic insulating (AFI) phases, ferromagnetic insulating (FMI) phases and ferromagnetic metal (FMM) phases, which is induced by Nd doping effect

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A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3−x□xCoO3 cobaltites

Cited by 8 publications

References 19 publications

Synthesis, and measurement of structural and magnetic properties, of La1−xCdxCoO3 perovskite ceramic oxides

Synthesis, and measurement of structural and magnetic properties, of La1−xCdxCoO3 perovskite ceramic oxides

Effect of Y-doping on the transport and magnetic properties of La0.5Sr0.5CoO3 and La0.7Sr0.3CoO3

Structural Magnetic and Electrical Properties in Nd-Doped Manganites (La0.70−x Nd x )Sr0.30Mn0.70Ti0.30O3 with 0 ≤ x ≤ 0.30

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