Magnetic evidence of different environments of manganese ions in Mn-substituted strontium titanate

Electron paramagnetic resonance (EPR) and static magnetization data on manganese substituted (up to 3 mol%) strontium tintanate (Mn:SrTiO 3) samples are presented. Four EPR signals are observed from different Mn 4+ and Mn 2+ sites. The behavior of their intensity vs. temperature is discussed. It sug...

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Bibliographic Details
Published in:Solid state communications 2000-01, Vol.114 (12), p.617-622
Main Authors: Azzoni, C.B., Mozzati, M.C., Paleari, A., Massarotti, V., Bini, M., Capsoni, D.
Format: Article
Language:English
Subjects:
A. Disordered systems
C. Grain boundaries
C. X-ray scattering
Condensed matter: electronic structure, electrical, magnetic, and optical properties
E. Electron paramagnetic resonance
Electron paramagnetic resonance and relaxation
Exact sciences and technology
Iron group (3d) ions and impurities (ti-cu)
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Physics
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Summary:Electron paramagnetic resonance (EPR) and static magnetization data on manganese substituted (up to 3 mol%) strontium tintanate (Mn:SrTiO 3) samples are presented. Four EPR signals are observed from different Mn 4+ and Mn 2+ sites. The behavior of their intensity vs. temperature is discussed. It suggests the presence of antiferromagnetic interactions in heavily Mn doped grain boundaries. X-ray diffraction analysis shows two coexisting perovskite-type phases, whose abundance depends on the Mn content.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(00)00121-6