Počet záznamů: 1  

Observation of nano sized effect on EPR of Mn.sup.4+./sup. and Cr.sup.3+./sup. in SrTiO.sub.3./sub. powders

  1. 1.
    0454879 - FZÚ 2016 RIV GB eng J - Článek v odborném periodiku
    Badalyan, A. G. - Azamat, Dmitry - Trepakov, Vladimír - Makarova, Marina - Rosa, Jan - Dejneka, Alexandr - Jastrabík, Lubomír
    Observation of nano sized effect on EPR of Mn4+ and Cr3+ in SrTiO3 powders.
    Ferroelectrics. Roč. 485, č. 1 (2015), s. 63-67. ISSN 0015-0193. E-ISSN 1563-5112
    Grant CEP: GA MŠMT LO1409; GA TA ČR TA03010743
    Institucionální podpora: RVO:68378271
    Klíčová slova: EPR * nanopowder * strontium titanate
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 0.491, rok: 2015

    The chromium doped SrTiO3 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. Mn4+ ions on Ti4+ 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 Cr3+ ions did not substitute for Ti4+ and form some phase at the surface of SrTiO3 particles.
    Trvalý link: http://hdl.handle.net/11104/0255533

     
     
Počet záznamů: 1  

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