AI Article Synopsis
- This paper discusses the synthesis and analysis of pure La(0.5)Sr(1.5)MnO(4) and lightly doped versions with Ru, Co, and Ni to investigate how cation doping affects charge and orbital ordering.
- The findings indicate that even minimal doping can effectively suppress the charge and orbital ordering present in the pure manganite sample.
- The research also reveals that while there's no long-range magnetic order in doped samples, a spin-glass state emerges, characterized by a freezing temperature around 22 K, and highlights structural changes linked to the size of the cations.
Article Abstract
In this paper we report the results of the synthesis and structural, transport, and magnetic characterization of pure La(0.5)Sr(1.5)MnO(4) and B-site lightly doped samples, i.e. La(0.5)Sr(1.5)Mn(0.95)B(0.05)O(4), where B = Ru, Co, and Ni. The choice was made in order to probe the charge ordering/orbital ordering ground state of the monolayered La(0.5)Sr(1.5)MnO(4) manganite as a consequence of the cation doping. It is shown that even a light doping is successful in suppressing the charge and orbital order found in pure La(0.5)Sr(1.5)MnO(4). No long-range magnetic order has been detected in any of the doped samples but the setup of a spin-glass state with a common freezing temperature ( approximately 22 K). 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 orbital character of the e(g) electrons along with the overall cation size.
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| http://dx.doi.org/10.1021/jp063384+ | DOI Listing |
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