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DyNi crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Dy is bonded in a 7-coordinate geometry to seven equivalent Ni atoms. There are a spread of Dy–Ni bond distances ranging from 2.86–2.93 Å. Ni is bonded in a 9-coordinate geometry to seven equivalent Dy and two equivalent Ni atoms. Both Ni–Ni bond lengths are 2.55 Å.
In this report, we investigated a new rare-earth-based one-dimensional Ising spin chain magnet DyNi 5 Ge 3 by means of magnetization, specific heat, and powder neutron diffraction measurements. Due to the crystalline electrical field splitting, the magnetic Dy ions share an Ising-like ground doublet state. Owning to the local point symmetry, these Ising moments form into two canted magnetic sublattices, which were further confirmed by the angle-dependent magnetization measurement. In zero fields, two successive antiferromagnetic phase transitions were found at temperatures T N1 =6K and T N2 =5K, respectively. Only part of the moments are statically ordered in this intermediate state between T N1 and T N2 . Powder neutron diffraction experiments at different temperatures were performed as well. Further, an incommensurate magnetic propagation vector of k m =(0.5,0.4,0.5) was identified. The refined spin configurations through the irreducible representation analysis confirmed that these Ising spins are canted in the crystal ab plane.