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Journal Article

Structural chemistry and physical properties of ternary compounds R6Ni15As10, R = Y, Sm, Gd, Tb, Dy

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Babizhetskyy,  V.
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;
Department Quantum Materials (Hidenori Takagi), Max Planck Institute for Solid State Research, Max Planck Society;
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280526

Simon,  A.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Babizhetskyy, V., Hiebl, K., & Simon, A. (2006). Structural chemistry and physical properties of ternary compounds R6Ni15As10, R = Y, Sm, Gd, Tb, Dy. Journal of Alloys and Compounds, 413(1-2), 17-25.


Cite as: https://hdl.handle.net/21.11116/0000-000F-0291-A
Abstract
The ternary rare-earth nickel arsenides R6Ni15As10 (R = Y. Sm, Gd, Tb,
Dy) were synthesized from the elements by reaction at elevated
temperatures. They were found to crystallize with a hexagonal structure
which was determined from single-crystal X-ray data in case of
Tb6Ni15As10, space group P6(3)/m, Z = 2, a = 17.005(1) angstrom and c =
3.8877(2) angstrom. The crystal structure for the isostructural
compound Gd6Ni15As10 has been determined using X-ray powder diffraction
data (full profile refinement: a = 17.0350(4) angstrom and c =
3.9183(l) angstrom). These compounds belong to a large family of
hexagonal structures with a metal to metalloid ratio of 2:1. The
paramagnetism of these compounds is only due to the lanthanoid 4f
magnetic moment, whereas nickel is non-magnetic. At low temperatures
the samples undergo magnetic transitions, anti-ferromagnetic in case of
the Sin and Gd ternaries with T-N = 15 and 24 K and ferromagnetic for
Tb6Ni15As10 with T-C = 12 K, respectively. The temperature dependence
of the electrical resistivity, p(T), reflects the metallic character of
these compounds. Characteristic changes of the slopes of the p(T) plots
confirm the magnetic transitions. (c) 2005 Elsevier B.V. All rights
reserved.