Nanometric size effect on magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite: EPR probing

M. Auslender, Cheol Eui Lee, E. Rozenberg, A. I. Shames, D. Mogilyansky, E. Sominski, A. Gedanken

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Measurements of the X-band electron paramagnetic resonance and the model fittings of the linewidth and intensity versus temperature dependences were employed to probe the finite-size effect on the magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite. It is shown that complex mixed magnetic ordering in bulk samples, comprised of the antiferromagnetic and the charge-ordered (AFM/CO) component, together with the ferromagnetic one, appear to be unstable regarding this effect; the AFM/CO phase is suppressed in nano-samples, which agrees with the data of magnetic measurements. In addition, we have managed to show that the FM state, appearing in nano-grains, is frustrated due to (i) an AFM-like core-shell interaction and (ii) a strong spin disorder at the surfaces and core-shell transition layers.

Original languageEnglish
Pages (from-to)1559-1562
Number of pages4
JournalJournal of the Korean Physical Society
Volume57
Issue number61
DOIs
Publication statusPublished - 2010 Dec

Keywords

  • Doped manganites
  • Electron paramagnetic resonance
  • Nanotechnology

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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