Effect of A-site cation ordering on the magnetoelectric properties in [(LaMnO3)m/(SrMnO3)m]n artificial superlattices -: art. no. 144418

In order to evaluate the effect of charge transfer and/or charge ordering in La1-xSrxMnO3 on the magnetic and transport properties, a library of [(LaMnO3)(m)/(SrMnO3)(m)](n) superlattices have been fabricated by the combinatorial pulsed laser deposition method. The properties of superlattices were found to depend strongly on the periodicity m; superlattices of mless than or equal to4 behaved like a solid solution La0.5Sr0.5MnO3 film, while the superlattices of m>4 were significantly different from the solid solution. These superlattices exhibited a higher resistivity and lower Curie temperature than mless than or equal to4 superlattices. The results indicate that the properties of the superlattices are dominated not only by the magnetic interaction between the superlattice constituents but also by carrier (e(g) electrons) transfer thorough the superlattice interface. The contribution of carrier transfer is supported by the magnetoelectric properties of another library of [(La0.8Sr0.2MnO3)(8)/(La0.2Sr0.8MnO3)(m)](12) superlattices. The A-site cation order can change both effective carrier concentration and magnetic interaction.