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Doping effects in single-layered La0.5Sr1.5MnO4 manganites

Lorenzo Malavasi·Anna Maria Bertasa·Maria Cristina Mozzati·Cristina Tealdi·Carlo Bruno Azzoni·Giorgio Flor
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Abstract

In this paper we report the results of the synthesis and structural, transport and magnetic characterization of pure La0.5Sr1.5MnO4 (LSMO) and 5% doped samples, i.e. La0.5Sr1.5Mn0.95B0.05O4, where B = Ru, Co and Ni. It is shown that even a light doping is successful in suppressing the charge and orbital ordering found for the pure LSMO. In general, doping favours the carrier motion and, from a magnetic point of view, the set-up a spin-glass state. Moreover, structural parameters show an anisotropy in the lattice constant variation, with the tetragonal distortion increasing as the cell volume reduces, which may suggest a variation in the relative nature of the orbital character of the eg electrons along with the overall cation size.

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Lorenzo Malavasi, Anna Maria Bertasa, Maria Cristina Mozzati, Cristina Tealdi, Carlo Bruno Azzoni, Giorgio Flor. 2005-08-19. Doping effects in single-layered La0.5Sr1.5MnO4 manganites. https://arxiv.org/abs/cond-mat/0508464

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