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Gadolinium trisilicide - a paramagnetic representative of the YbSi3 type series

MPS-Authors
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Neziraj,  Teuta
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Meier-Kirchner,  Katrin
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  Walter
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Wirth,  Steffen
Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Grin,  Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schwarz,  Ulrich
Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Neziraj, T., Meier-Kirchner, K., Schnelle, W., Wirth, S., Grin, Y., & Schwarz, U. (2022). Gadolinium trisilicide - a paramagnetic representative of the YbSi3 type series. Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences, 77(4-5), 323-329. doi:10.1515/znb-2022-0024.


Cite as: https://hdl.handle.net/21.11116/0000-000A-6EA4-2
Abstract
Binary gadolinium trisilicide GdSi3 was prepared by high-pressure high-temperature synthesis at typically 9.5(5) GPa and 870 K before quenching to ambient conditions. At ambient pressure, GdSi3 exhibits an exothermic decomposition at 647(10) K into the thermodynamically stable phases GdSi2-x and Si, indicating its metastable character. Powder X-ray diffraction data is consistent with the YbSi3-type crystal structure comprising slabs of condensed Si-2 dumbbells, which enclose layered arrangements of gadolinium cations. Quantum chemical analysis of the chemical bonding shows, that the framework is formed by silicon dumbbells with homopolar bonds. The magnetic moment of 8.13(8) mu(B) is consistent with Gd4f(7) (Gd3+ state) and antiferromagnetic ordering is observed below 64(1) K.