The crystal structure, magnetism, and colossal magnetoresistance of Y₂CrS₄

Ternary yttrium chromium sulfide, Y₂CrS₄, prepared by the solid-state reaction of Y₂S₃, Cr, and S, was found to exhibit an antiferromagnetic transition at about 64 K. The X-ray diffraction pattern at 300 K was refined with space group Pca2₁, and the structure parameters were determined to be a=12.51 Å, b=7.53 Å, and c=12.49 Å. We investigated the magnetotransport properties, and observed negative colossal magnetoresistance reaching up to 2.5\times10⁴% in the semiconducting compound of Y₂CrS₄.