Observation of Nano Sized Effect on EPR of Mn^sup 4+^ and Cr^sup 3+^ in SrTiO^sub 3^ Powders

The chromium doped SrTiO... nanopowders with particles size of 100, 50, 20 nm sizes have been synthesized and studied by Electron Paramagnetic Resonance (EPR). Along with chromium impurity it was found the powder contained small concentration of manganese as a residential impurity. ... ions on ... l...

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Bibliographic Details
Published in:Ferroelectrics 2015-01, Vol.485 (1), p.63
Main Authors: Badalyan, A G, Azamat, D V, Trepakov, V A, Makarova, M V, Rosa, J, Dejneka, A, Jastrabik, L
Format: Article
Language:English
Subjects:
Chromium
Crystal lattices
Ferroelectrics
Ions
Nanocrystals
Phase transitions
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Summary:The chromium doped SrTiO... nanopowders with particles size of 100, 50, 20 nm sizes have been synthesized and studied by Electron Paramagnetic Resonance (EPR). Along with chromium impurity it was found the powder contained small concentration of manganese as a residential impurity. ... ions on ... lattice sites were identified, with spin-Hamiltonian parameters closed to even in the bulk material. It was found that the linewidth depends on particle size. This effect may be traced back to changes of the small parameter of fine structure D due to its dependence on the particle size of the individual nanocrystallite. It seems, the most of ... ions did not substitute for ... and form some phase at the surface of SrTiO... particles. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0015-0193
1563-5112