Syntheses, crystal structure and magnetic properties of Tl9RETe6 (RE = Ce, Sm, Gd)
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Date
2020
Authors
Volume
10
Issue
4
Journal
Crystals
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Publisher
Basel : MDPI AG
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Abstract
The three compounds Tl9RETe6 with RE = Ce, Sm, Gd were synthesized from the elements at 1020 K. Their isostructural crystal structures are ordered derivatives of the Tl5Te3 type with rare-earth metal and thallium occupying different Wyckoff positions. The structures can be understood as charge-ordered in accordance with the Zintl-Klemm concept: 9 Tl+ + RE3+ + 6 Te2-. DFT calculations for Tl9GdTe6, however, result in a low, but finite density of states at the Fermi level. Magnetic data confirm trivalent Gd, but indicate a small amount of Ce4+ in Tl9CeTe6; no indications for long-range magnetic order was found down to T = 2 K.
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Isaeva, A., Schönemann, R., & Doert, T. (2020). Syntheses, crystal structure and magnetic properties of Tl9RETe6 (RE = Ce, Sm, Gd) (Basel : MDPI AG). Basel : MDPI AG. https://doi.org//10.3390/cryst10040277
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CC BY 4.0 Unported