Abstract
Crystal structures and magnetic properties of the ternary sulfides BaLn2S4 (Ln = Sm, Gd-Lu) are reported. Their powder X-ray diffraction measurements and Rietveld analyses show that they adopt the CaFe2O4-type structure with space group Pnma. The lattice parameters linearly increase with the Ln3+ ionic radius. Magnetic susceptibility measurements were carried out from 1.8 to 300 K. The BaLn2S4 compounds for Ln = Gd-Yb show the Curie-Weiss paramagnetic behavior, and BaSm2S4 shows the van Vleck paramagnetism.
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