2005/05/12 by Lorenzo Malavasi, Maria Cristina Mozzati, Malavasi, Lorenzo +8
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0505309
28 Pages, 7 Figures
arxiv created 2005/05/12 · openalex publication_date 2005/05/12 · arxiv updated 2009/12/01 · openalex created_date 2022/09/02 · openalex updated_date 2026/07/28
In this work we report a structural, electrical and magnetic characterization\nof the La1-xNaxMn1-yRuyO3+d (LNMRO) system with x = 0.05, 0.15 and y = 0, 0.05,\n0.15, also comprising an investigation of the role of the oxygen content on the\nrelated redox properties. The experimental investigation has been realized with\nthe aid of X-ray powder diffraction, electron microprobe analysis,\nthermogravimetry, electrical resistivity and magnetization measurements, and\nelectron paramagnetic resonance. We demonstrate that the effect of ruthenium\ndoping on the studied LNMRO compounds is not only directly related to the Ru/Mn\nsubstitution and to the Ru oxidation state but also indirectly connected to the\noxygen content in the sample. Our data show that ruthenium addition can improve\nelectrical and magnetic properties of non-optimally (low) cation doped\nmanganites, causing an increase of the TC value and the insurgence of MR\neffect, as observed for the x = 0.05 and y = 0.05 sample.\n