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Crystal Structure, Magnetic, Electronic, and Thermal Transport Properties of Ternary Compounds REReB4 (RE = Ce, Gd-Er, Yb)

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Abramchuk,  Mykola
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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Veremchuk,  Igor
Igor Veremchuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Leithe-Jasper,  Andreas
Andreas Leithe-Jasper, Chemical Metal Science, 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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Citation

Abramchuk, M., Schnelle, W., Veremchuk, I., Leithe-Jasper, A., Grin, Y., & Gumeniuk, R. (2016). Crystal Structure, Magnetic, Electronic, and Thermal Transport Properties of Ternary Compounds REReB4 (RE = Ce, Gd-Er, Yb). European Journal of Inorganic Chemistry, (1), 161-168. doi:10.1002/ejic.201501038.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-7DDD-2
Abstract
Rare-earth rhenium borides REReB4 (RE = Ce, Gd-Er, Yb) were synthesized by various methods, including spark plasma sintering. They crystallize with the YCrB4 structure type (space group Pbam). The Tb, Ho, Er, and Yb representatives are Curie-Weiss paramagnets with the RE atoms in the +3 oxidation state, whereas the cerium atoms in CeReB4 are in the 4f(0) configuration (oxidation state +4). Electronic-structure calculations predict CeReB4 to be a metal with a density of states N(E-F) = 1.6 stateseV(-1)f.u.(-1) (f.u.: formula unit). Measurements of the transport properties confirm that REReB4 (RE = Ce, Tb, Ho) are metallic materials with low thermopowers and relatively high thermal conductivities.