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arXiv · 0705.3080

Effect of Mo doping for the Mn site in the ferromagnetic manganite La0.7Ca0.3MnO3

G. Narsinga Rao·J. W. Chen
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Abstract

The structure, electronic, and magnetic properties of the Mo-doped perovskite La0.7Ca0.3Mn1-xMoxO3 (x < 0.1) have been studied. A significant increase in resistivity and lattice parameters were observed with Mo doping. A marginal decrease in the Curie temperature Tc and the associated metal-insulator transition Tp were observed. Magnetization data reveal that long-range ferromagnetic ordering persists in all samples studied and the saturation moment decreases linearly as x increases. Enhancement in magnetoresistance at near Tc in the Mo-doped compounds with an optimum doping value x = 0.05 was observed. The overall experimental results can be explained by considering the induced Mn2+ ions with Mo6+ in the Mo-doped systems, with the strong FM coupling between Mn4+/2+- O - Mn3+.

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G. Narsinga Rao, J. W. Chen. 2007-05-22. Effect of Mo doping for the Mn site in the ferromagnetic manganite La0.7Ca0.3MnO3. https://arxiv.org/abs/0705.3080

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