Comment on "the magnetic properties of nanosized La 1-xCa xMnO 3 (0.5 ≤ x ≤ 0.8)"

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4 Scopus citations


Some data on the dc and ac magnetic properties of electron-doped La 1-xCa xMnO 3 (LCMO, 0.5 ≤ x ≤ 0.8) sol-gel prepared nanoparticles with mean particle size of ∼50 nm have been reported in a recent article (Liu et al. J Nanopart Res 13:2305, 2011). In particular, it is claimed that the charge ordering (CO) transition, which is observed in the bulks, disappears completely, and the ferromagnetic (FM) one occurs in all the samples studied. The authors also attributed the enhanced FM state with relatively large values of spontaneous magnetization in their samples to the good connection among the adjacent particles. It is suggested in the comment through the present article that such claims seem to be doubtful, and a natural reason for the above noted effects may be the systematic shift of a real composition (Ca-doping level) from its nominal value due to, e.g., oxygen non-stoichiometry of the considered samples. The numerous uncertainties and obscurities are also characteristic of the article being commented upon.

Original languageEnglish
Pages (from-to)7313-7316
Number of pages4
JournalJournal of Nanoparticle Research
Issue number12
StatePublished - 1 Dec 2011


  • Charge-ordered over-doped manganites
  • Core-shell nanoparticles
  • La-Ca manganites
  • Spontaneous magnetization

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Atomic and Molecular Physics, and Optics
  • Modeling and Simulation
  • General Materials Science
  • Condensed Matter Physics


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