12005-75-3Relevant academic research and scientific papers
Structure and Transport Properties in Itinerant Antiferromagnet RE2(Ni1-xCu x)5As3O2 (RE = Ce, Sm)
Chen, Xu,Guo, Jian-Gang,Gong, Chunsheng,Cheng, Erjian,Song, Yanpeng,Ying, Tianping,Deng, Jun,Li, Shiyan,Chen, Xiaolong
, p. 2770 - 2776 (2019)
We report the crystal structure and physical properties of two Ni5As3-based compounds RE2Ni5As3O2 (RE = Ce, Sm). The former exhibits structural phase transition from tetragonal (space group I4/mmm, 139) to orthorhombic (space group Immm, 71) symmetry at 230 K, while the latter undergoes a charge-density-wave-like structural distortion with abrupt change of Ni-As bond length. Both compounds show antiferromagnetic transitions due to RE3+ ions ordering at 4.4 and 3.4 K, accompanying with the large enhancement of Sommerfeld coefficients comparing to the nonmagnetic La analogue. Although the Cu substitution for Ni induces structural anomalies and suppression of structural transition like the behaviors in La/Pr/Nd analogues, the superconductivity is not observed in both Cu-doped RE2Ni5As3O2 (RE = Ce, Sm) above 0.25 K. Our structural refinements reveal that the lacking of superconductivity in RE2(Ni1-xCux)5As3O2 might relate to the anomalous increase of As height, h1.
Transition Metal Pnictide Synthesis: Self Propagating Reactions Involving Sodium Arsenide, Antimonide and Bismuthide
Hector, Andrew L.,Parkin, Ivan P.
, p. 477 - 482 (2007/10/02)
Initiation of the reaction between Na3E (E=As, Sb, Bi) and anhydrous metal halides at 25 to 550 deg C produces metal arsenides MxAsy (M = Y, La, Ti, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Pt, Cu and Zn) and antimonides MxSby (M = Ti, V, Nb, Ta, Cr, Fe, Co, Ni, Pt, Cu and Zn) via an exothermic selfpropagating reaction.The metal arsenides were characterized by X-ray powder diffraction, SEM/EDAX, microanalysis and FT-IR. - Keywords: Metal Arsenide, Sodium Arsenide, Metal Antimonide, Sodium Antimonide, Solid State Methathesis
