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Influences of Ru Substitution for Mn on Magnetic Properties and Charge Ordering Phase of La0.4Ca0.6MnO3

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La0.4Ca0.6Mn1–x Ru x O3 (x = 0.00, 0.02, 0.04, 0.06, 0.08) were prepared by the solid-state reaction method. The structure of the samples was detected by X-ray diffraction (XRD) patterns, and the influences of the substitution of Ru with 4d electrons for Mn on magnetic properties and charge ordering phase of La0.4Ca0.6MnO3 were studied through the measurements of magnetizationtemperature (M-T) curves and electron spin resonance (ESR) spectra. The results indicate that: with the increase of Ru substitution amount, magnetism strengthens gradually, and antiferromagnetism weakens gradually; Ru substitution for Mn easily destroys the charge ordering phase of La0.4Ca0.6MnO3, and charge ordering phase is melted when x = 0.04. This is because Ru ions are mainly in the form of Ru4+ with high spin when Ru substitutes for Mn, the electronic correlation of 4d electrons is weaker than that of 3d electrons, and the delocalization of 4d electrons is strong, which are beneficial to double exchange function, then ferromagnetism strengthens and antiferromagnetism weakens.
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Keywords: CHARGE ORDERING; MAGNETIC PROPERTIES; PEROVSKITE MANGANITE; RU SUBSTITUTION FOR MN

Document Type: Short Communication

Publication date: February 1, 2016

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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