Size and nonstoichiometry effects on magnetic properties La 0.5Ca0.5MnO3 manganite

Evgeny Rosenberg, M. I. Tsindlekht, I. Felner, E. Sominski, A. Gedanken, Ya M. Mukovskii, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

AC and dc magnetic measurements in temperature interval 5-350 K and at external magnetic field H ≤ 5 T were employed to probe the finite-size and nonstoichiometry effects on magnetic ordering of La0.5Ca 0.5MnO3 half-doped manganite compound. It is shown that the complex mixed magnetic ordering in bulk samples appears to be unstable regarding the both effects. The strongest one is the size effect, suppressing the mixed order and inducing the ferromagnetic-like one, which is characteristic also for other half-doped manganites. The small variations in cation composition (nonstoichiometry), which don't influence the crystal structure, lead to strong perturbations in the mixed magnetic ordering of the bulk. The results obtained are discussed in the terms of pronounced competition of spin, charge and lattice degrees of freedom, characteristic for doped manganites.

Original languageEnglish
Article number4957706
Pages (from-to)2576-2579
Number of pages4
JournalIEEE Transactions on Magnetics
Volume45
Issue number6
DOIs
StatePublished - 1 Jun 2009
Externally publishedYes

Keywords

  • Magnetization processes
  • Manganese compounds
  • Nanotechnology

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