Structural study of Yb1–xTbxMnO3 manganites: site occupancy and coexistence of hexagonal and orthorhombic phases

Content Provider	Semantic Scholar
Author	Guarín, Mónica Esperanza Bolívar Moreira, Alexandre Speziali, Nivaldo Lúcio
Copyright Year	2013
Abstract	Polycrystalline samples of mixed Yb1−xTbxMnO3 (x = 0, 0.25, 0.50, 0.75 and 1) were prepared by a solid state reaction procedure. Detailed crystal structure studies were performed using X-ray diffraction data obtained at room temperature. The application of the Rietveld method confirmed the reported hexagonal P63cm and orthorhombic Pnma phases for x = 0 (YbMnO3) and x = 1 (TbMnO3), respectively. A single hexagonal phase was also observed for x = 0.25, while in the case of x = 0.50 and x = 0.75 both phases coexist in the produced samples. Crystallographic parameters for the pure compounds are in agreement with those found in the literature. Changes in the lattice parameters, unit-cell volume, polyhedral distortions and tilting observed in the mixed compounds are explained as a function of x. Sharing of Tb3+ and Yb3+ ions between different sites is discussed.
Starting Page	644
Ending Page	648
Page Count	5
File Format	PDF HTM / HTML
DOI	10.1107/S0021889813010546
Volume Number	46
Alternate Webpage(s)	http://journals.iucr.org/j/issues/2013/03/00/fs5035/fs5035.pdf
Alternate Webpage(s)	https://doi.org/10.1107/S0021889813010546
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article