Electronic and magnetic ordering induced by Mo- and Ru doping of the Mn site in CaMnO 3 perovskite: EMR probing

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Abstract

X-band electron magnetic-resonance (EMR) measurements of polycrystalline Ca Mn1-y Moy O3 (0≤y≤0.14) samples were performed at 120 K≤T≤540 K. The data obtained are compared with those of another electron-doped manganite system, Ca Mn1-x Rux O3 (0≤x≤0.40). The observed anomalies of the EMR parameters correlate pretty well with the temperatures of antiferro-, ferromagneticlike, and orbital/charge-ordering transitions in these systems. However, a strong difference is observed between the resonant properties of Mo- and Ru doped series at both paramagnetic (PM) and magnetically ordered states. To describe such a difference, the energy-band diagrams, which comprise the deep impurity t2g -like states + eg -like conductive band for Ca Mn1-x Rux O3 and shallow impurity states+conductive band, both having eg -like symmetry, for Ca Mn1-y Moy O3, are proposed. Specific electrons' contribution to the EMR linewidth at PM temperatures is introduced for the considered systems.

Original languageEnglish
Article number10H704
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
StatePublished - 15 May 2005

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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