Rapid synthesis of room temperature ferromagnetic Ag-doped LaMnO3 perovskite phases by the solution combustion method
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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Title |
Rapid synthesis of room temperature ferromagnetic Ag-doped LaMnO3
perovskite phases by the solution combustion method
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Creator |
Bellakki, M.B.
Shivakumara, C. Vasanthacharya, N.Y. Prakash, A.S. |
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Subject |
Electrochemical Materials Science
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Description |
We report the rapid solution combustion synthesis and characterization of Ag-substituted LaMnO3 phases
at relatively low temperature using oxalyl dihydrazide, as fuel. Structural parameters were refined by the
Rietveld method using powder X-ray diffraction data. While the parent LaMnO3 crystallizes in the
orthorhombic structure, the Ag-substituted compounds crystallize in the rhombohedral symmetry. On
increasing Ag-content, unit cell volume and Mn–O–Mn bond angle decreases. The Fourier transform infra
red spectrumshows two absorption bands corresponding toMn–Ostretching vibration (ns mode) and Mn–
O–Mn deformation vibration (nb mode) around 600 cm-1 and 400 cm-1 for the compositions, x = 0.0, 0.05
and 0.10, respectively. Electrical resistivity measurements reveal that composition-controlled metal to
insulator transition, with the maximum metal to insulator being 280 K for the composition
La0.75Ag0.25MnO3. Increase in magnetic moment was observed with increase in Ag-content. The maximum
magnetic moment of 35 emu/g was observed for the composition La0.80Ag0.20MnO3.
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Publisher |
Elsevier Ltd.
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Date |
2010
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://cecri.csircentral.net/532/1/2010-117.pdf
Bellakki, M.B. and Shivakumara, C. and Vasanthacharya, N.Y. and Prakash, A.S. (2010) Rapid synthesis of room temperature ferromagnetic Ag-doped LaMnO3 perovskite phases by the solution combustion method. Materials Research Bulletin, 45. pp. 1685-1691. ISSN 0025-5408 |
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Relation |
http://cecri.csircentral.net/532/
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