Ferromagnetic ordering in LaMn1-xO3 manganites: EMR probing

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7 Scopus citations

Abstract

Electron magnetic resonance (EMR) was employed to study magnetic properties of self-doped LaMn1-xO3 (x=0, 0.02 and 0.06) manganites in interval 120-600 K. Resonance spectra evidence that x=0 and 0.02 samples show antiferromagnetic (AFM) ground state at low temperatures, while x=0.06 one demonstrates ferromagnetic (FM)-like ground state. Spectra of the parent compound reveal some FM entities within the AFM matrix. Self-doping leads to a sharp increase of low-temperature double-integrated intensity of resonance signals pointing out progressive growth of ferromagnetic component. Paramagnetic (PM) state g-factor gradually changes from 1.91±0.01 to 1.98 with increasing x from 0 to 0.06. The results obtained show that vacancies at Mn-sites induce FM state through creation of Mn4+ ions in Mn3+ host and reinforcement of double-exchange (DE) interaction.

Original languageEnglish
Pages (from-to)e640-e643
JournalJournal of Magnetism and Magnetic Materials
Volume316
Issue number2 SPEC. ISS.
DOIs
StatePublished - 1 Jan 2007

Keywords

  • Ferromagnetic and electron paramagnetic resonance
  • Self-doped CMR manganite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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