Cobalt-induced structural modulation in multiferroic Aurivillius-phase oxides

0533860 - ÚFM 2021 RIV GB eng J - Článek v odborném periodiku
Koval, V. - Shi, Y. - Škorvánek, I. - Viola, G. - Bureš, R. - Saksl, K. - Roupcová, Pavla - Zhang, M. - Jia, C. - Yan, H.
Cobalt-induced structural modulation in multiferroic Aurivillius-phase oxides.
Journal of Materials Chemistry C. Roč. 8, č. 25 (2020), s. 8466-8483. ISSN 2050-7526. E-ISSN 2050-7534
Institucionální podpora: RVO:68081723
Klíčová slova: MAGNETOELECTRIC MEASUREMENTS * MAGNETIC-PROPERTIES * FERROMAGNETISM * BI5FETI3O15
Obor OECD: Chemical process engineering
Impakt faktor: 7.393, rok: 2020
Způsob publikování: Omezený přístup
https://pubs.rsc.org/en/content/articlelanding/2020/TC/D0TC01443E#!divAbstract

Series of samples of Aurivillius (Bi4.3Gd0.7)(Fe1-xCox)(1+y)Ti3-2yNbyO15(x= 0, 0.3, 0.5 andy= 0, 0.3) compounds were prepared by a solid-state reaction. The Co-free composition showed a single-phase four-layered Aurivillius structure (space groupA2(1)am), while the Co substitution was found to give rise to a mixed-layer structure composed of four- and three-layered phases. The highest values of the remanent and saturation magnetization at room temperature were obtained for the compositions with x= 0.3, in which the occurrence and enhancement of the magnetization can be attributed to the ferromagnetic clustering of the FeO(6)and CoO(6)octahedra and, partly, also to spin canting effects and/or a double-exchange magnetic interaction between the mixed-valence cobalt through oxygen.
Trvalý link: http://hdl.handle.net/11104/0312117