A superstructure modulation induced by La doping of the layered manganate LaxSr4-xMn3O10

  • Yang H
  • Tang Y
  • Yao L
 et al. 
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In this paper, transmission electron microscopy (TEM) has been used for studying the slightly La-doped layered manganate LaxSr4-xMn3O10. Albeit the samples for x ≤ 0.15 appear single phased from the powder X-ray diffraction (XRD) analysis, the presence of numerous modulated domains in them has been revealed by electron diffraction and high-resolution electron microscopy. Electron diffraction data indicate that the local superstructure modulation is two-dimensional, and the modulation plane lies in the ac plane. The two primary modulation vectors are q1= (1 / 4) a*and q2= (1 / 2) c*. High-resolution electron microscopy data suggest that the origin of the modulated structure is possibly attributable to an ordering of the La dopants. The locally modulated structure may have a correlation with the magnetic properties, typical of the ferromagnetic (FM) clusters, of the LaxSr4-xMn3O10manganate. © 2006 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • LaxSr4-xMn3O10
  • Superstructure modulation
  • TEM

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  • H. Yang

  • Y. K. Tang

  • L. D. Yao

  • W. Zhang

  • Q. A. Li

  • F. Y. Li

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