Influence of hole carrier density and sintering temperature on the electronic properties of magnetoresistive La0.7Pb0.3Mn1⊟xRuxO3 (0.0 ≤ x ≤x 0.4)

A novel magnetic pair-making interaction between Mn and Ru shows a strong correlation between the magnetic ordering and electronic transport, which was well exemplified in the investigation of bulk polycrystalline samples of La0.7Pb0.3Mn1⊟xRuxO3 and La0.6Pb0.4Mn1⊟xRuxO3, where 0.0 ≤ x ≤ 0.4. The met...

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Bibliographic Details
Published in:Journal of materials research 2002, Vol.17 (12), p.3090-3097
Main Authors: Sahu, Ranjan Kumar, Rao, Manju Lata, Manoharan, Solomon Sundar, Elefant, Dieter, Verges, Peter, Schneider, Claus M.
Format: Article
Language:English
Online Access:Get full text
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Summary:A novel magnetic pair-making interaction between Mn and Ru shows a strong correlation between the magnetic ordering and electronic transport, which was well exemplified in the investigation of bulk polycrystalline samples of La0.7Pb0.3Mn1⊟xRuxO3 and La0.6Pb0.4Mn1⊟xRuxO3, where 0.0 ≤ x ≤ 0.4. The metal-insulator transition (Tρ) complementing the Curie temperature (Tc) was observed up to 30% of Ru in La0.7Pb0.3Mn1⊟xRuxO3, and extended up to 40% of Ru in La0.6Pb0.4Mn1⊟xRuxO3, showing a unique double-exchange ferromagnetic exchange interaction between Mn and Ru ions. An upturn in resistance due to charge carrier localization at low temperatures (T
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2002.0447