FMR probing of 'spontaneous' and Ru-doping induced ferromagnetism in Sm0.2Ca0.8Mn1-xRuxO3 (x ≤ 0.08) manganites

A. I. Shames, E. Rozenberg, V. Markovich, M. Auslender, A. Yakubovsky, A. Maignan, C. Martin, B. Raveau, G. Gorodetsky

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The FMR spectra of electron-doped Sm0.2Ca0.8Mn1-xRuxO3 (0 ≤ x ≤ 0.08) system are measured and analyzed in the temperature interval 100 ≤ T ≤ 320 K, including all critical points of magnetic transitions. It is shown that the origin of macroscopic magnetization in the parent Sm0.2Ca0.8MnO3 and Ru-doped compounds is essentially different. The bound magnetic polarons formation at temperatures below the Neel point is suggested to be responsible for the appearance of a minute 'spontaneous' magnetic moment in Sm0.2Ca0.8MnO3. Doping with Ru induces formation of 'conventional' ferromagnetic phase in antiferromagnetic matrix. Such a phase is characterized by a Curie temperature, which is higher than the Neel temperature of the matrix. Magnetic phase diagrams of Sm0.2Ca0.8Mn1-xRuxO3 determined by ferromagnetic resonance and dc magnetic measurements are discussed.

Original languageEnglish
Pages (from-to)395-399
Number of pages5
JournalSolid State Communications
Volume126
Issue number7
DOIs
StatePublished - 1 May 2003

Keywords

  • A. Ferromagnetic and electron paramagnetic resonance
  • B. Electron-doped manganites
  • C. Magnetic phase diagrams

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

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