Crystallographic Disorder and Strong Magnetic Anisotropy in DyPtSb.

We report the crystal growth and characterization of a rare-earth-containing material, DyPtSb. This compound possesses a similar structure to the previously reported YPtGe, but it lacks two layers of Pt atoms. Crystallographic disorder was found in DyPtSb. Additionally, the Dy-Dy framework was found to have both square net and triangular lattices. DyPtSb was determined to be antiferromagnetically ordered around ∼15 K while a competing antiferromagnetic sublattice also exists at lower temperature. Strong magnetic anisotropy was observed, and several metamagnetic transitions were seen in the hysteresis loops. Furthermore, the Curie-Weiss fitting revealed an unusually small effective moment of Dy, which is far below the expected value of Dy (10.65 μ). This material might provide a new platform to study the relationship between crystallographic disorder and magnetism.