Influence of Al doping in LaCoO3 on structural, electrical and magnetic properties

V. Aswin; Pramod Kumar; Pooja Singh; Anurag Gupta; S. Rayaprol; Anjana Dogra

doi:10.1007/s10853-014-8595-3

Influence of Al doping in LaCoO₃ on structural, electrical and magnetic properties

V. Aswin
, Pramod Kumar
, Pooja Singh
, Anurag Gupta
, S. Rayaprol
, Anjana Dogra

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

We report investigations on polycrystalline LaCo_1−xAl_xO₃ (x = 0–0.9) bulk samples. The solid state synthesized samples showed a coexistence of rhombohedral and monoclinic phases in the intermediate concentrations (0.2 ≤ x ≤ 0.5) and pure rhombohedral phase otherwise. The observed effect of Al doping on dc transport has been analysed on the basis of small polaron hopping mechanism. The magnetisation results presented give evidence of weak ferromagnetism and anomalous temperature dependence of coercivity which we associate to the canting of the localised high-spin Co(III) and anti-symmetric exchange interactions at low temperatures.

Original language	English
Pages (from-to)	366-373
Number of pages	8
Journal	Journal of Materials Science
Volume	50
Issue number	1
DOIs	https://doi.org/10.1007/s10853-014-8595-3
State	Published - 1 Jan 2015
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Science (miscellaneous)
General Materials Science
Mechanics of Materials
Mechanical Engineering
Polymers and Plastics

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title = "Influence of Al doping in LaCoO3 on structural, electrical and magnetic properties",

abstract = "We report investigations on polycrystalline LaCo1−xAlxO3 (x = 0–0.9) bulk samples. The solid state synthesized samples showed a coexistence of rhombohedral and monoclinic phases in the intermediate concentrations (0.2 ≤ x ≤ 0.5) and pure rhombohedral phase otherwise. The observed effect of Al doping on dc transport has been analysed on the basis of small polaron hopping mechanism. The magnetisation results presented give evidence of weak ferromagnetism and anomalous temperature dependence of coercivity which we associate to the canting of the localised high-spin Co(III) and anti-symmetric exchange interactions at low temperatures.",

author = "V. Aswin and Pramod Kumar and Pooja Singh and Anurag Gupta and S. Rayaprol and Anjana Dogra",

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T1 - Influence of Al doping in LaCoO3 on structural, electrical and magnetic properties

AU - Aswin, V.

AU - Kumar, Pramod

AU - Singh, Pooja

AU - Gupta, Anurag

AU - Rayaprol, S.

AU - Dogra, Anjana

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We report investigations on polycrystalline LaCo1−xAlxO3 (x = 0–0.9) bulk samples. The solid state synthesized samples showed a coexistence of rhombohedral and monoclinic phases in the intermediate concentrations (0.2 ≤ x ≤ 0.5) and pure rhombohedral phase otherwise. The observed effect of Al doping on dc transport has been analysed on the basis of small polaron hopping mechanism. The magnetisation results presented give evidence of weak ferromagnetism and anomalous temperature dependence of coercivity which we associate to the canting of the localised high-spin Co(III) and anti-symmetric exchange interactions at low temperatures.

AB - We report investigations on polycrystalline LaCo1−xAlxO3 (x = 0–0.9) bulk samples. The solid state synthesized samples showed a coexistence of rhombohedral and monoclinic phases in the intermediate concentrations (0.2 ≤ x ≤ 0.5) and pure rhombohedral phase otherwise. The observed effect of Al doping on dc transport has been analysed on the basis of small polaron hopping mechanism. The magnetisation results presented give evidence of weak ferromagnetism and anomalous temperature dependence of coercivity which we associate to the canting of the localised high-spin Co(III) and anti-symmetric exchange interactions at low temperatures.

UR - https://www.scopus.com/pages/publications/84919922887

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DO - 10.1007/s10853-014-8595-3

M3 - Article

AN - SCOPUS:84919922887

SN - 0022-2461

VL - 50

SP - 366

EP - 373

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 1

ER -

Influence of Al doping in LaCoO₃ on structural, electrical and magnetic properties

Abstract

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