Thermal stability of perovskite phase in heavily Mn-doped SrTiO3 nanoparticles in oxidizing and reducing atmospheres

0470445 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
Makarova, Marina - Artemenko, Anna - Kopeček, Jaromír - Laufek, František - Zemenová, Petra - Trepakov, Vladimír - Dejneka, Alexandr
Thermal stability of perovskite phase in heavily Mn-doped SrTiO3 nanoparticles in oxidizing and reducing atmospheres.
Scripta Materialia. Roč. 116, Apr (2016), s. 21-25. ISSN 1359-6462. E-ISSN 1872-8456
Grant CEP: GA ČR(CZ) GBP108/12/G108; GA TA ČR TA03010743; GA MŠMT LO1409; GA MŠMT LM2015088
Institucionální podpora: RVO:68378271
Klíčová slova: surface segregation * perovskite * nanocrystalline microstructure * thermally activated processes * metastable phases
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.747, rok: 2016

Complex investigations of the thermal stability as well as Mn-dopant distribution depending on chemical composition and processing condition have been performed in heavily doped SrTi1-xMnxO3 nanoparticles with x = 0.2 and 0.4. Prepared nanopowders reveal stable enough cubic perovskite structure even after treatment in oxidizing atmosphere up to 1000 °C. At the same time treatment in reducing atmosphere leads to decrease of the Mn solubility limit. Mn distribution evidences a weak tendency of Mn ions to migrate to surface. This migration increases in air and decreases at treatment in oxygen atmosphere.
Trvalý link: http://hdl.handle.net/11104/0268083