The crystal structure, magnetism, and colossal magnetoresistance of Y2CrS4

摘要

Ternary yttrium chromium sulfide,Y2CrS4,prepared by the solid-state reaction of Y283,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(A),b=7.53(A),and c=12.49(A).We investigated the magnetotransport properties,and observed negative colossal magnetoresistance reaching up to 2.5 x 104％ in the semiconducting compound of Y2CrS4.