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Eu3+ ions in the highly symmetrical octahedral site in Ba2MgWO6 double perovskite

Europium-doped double perovskite Ba2MgWO6 (BMW) has been successfully obtained by a conventional high-temperature solid-state method. The Eu3+ ions enter only the Mg2+ sites with Oh symmetry, which causes the unit cell to expand. The emission spectra measured at 8 K consists predominantly of a very...

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Published in:Journal of alloys and compounds 2019-09, Vol.802, p.190-195
Main Authors: Miniajluk, Natalia, Bondzior, Bartosz, Stefańska, Dagmara, Dereń, Przemysław J.
Format: Article
Language:English
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Summary:Europium-doped double perovskite Ba2MgWO6 (BMW) has been successfully obtained by a conventional high-temperature solid-state method. The Eu3+ ions enter only the Mg2+ sites with Oh symmetry, which causes the unit cell to expand. The emission spectra measured at 8 K consists predominantly of a very intense line at 597 nm corresponding to the 5D0 → 7F1 transition. No lines associated with f-f transitions are present on the excitation spectrum, which consists of a broad band centered at 301 nm, resulting from charge transfer transitions O2−→W6+. The emission decay curve for the sample with 0.1% Eu3+ at 10 K is single-exponential with decay time 4.23 ms. [Display omitted] •Ba2MgWO6 (BMW) double perovskite doped with Eu3+ was obtained by the high-temperature solid-state method.•The 5D0 .→ 7F1 magnetic dipole transition dominates the Eu3+ emission spectrum.•In BMW host Eu3+ ions replace only with Mg2+ with Oh highly symmetrical site symmetry.•The excitation spectrum of Eu3+ emission in BMW consists of only one the O2− .→ W6+ charge-transfer band centered at 301 nm.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.06.211