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• 作者：Pritam Shankhari ; Patrick R. N. Misse ; Mohammed Mbarki ; Hyounmyung Park ; Boniface P. T. Fokwa
• 刊名：Inorganic Chemistry
• 出版年：2017
• 出版时间：January 3, 2017
• 年：2017
• 卷：56
• 期：1
• 页码：446-451
• 全文大小：344K
• ISSN：1520-510X

文摘

The new quaternary boride series FeRh_6–nRu_nB₃ (n = 1–5) was synthesized by arc melting and characterized by powder and single-crystal X-ray diffraction (XRD), energy-dispersive X-ray analysis, and superconducting quantum interference device magnetometry. Single-crystal structure refinement showed the distribution of the iron atoms in two of three possible crystallographic 4d metal sites in the structure (Th₇Fe₃-type, space group P6₃mc). Rietveld refinements of the powder XRD data indicated single-phase synthesis of all the members. A linear decrease of the lattice parameters and the unit cell volume with increasing Ru content was found, indicating Vegard’s behavior. Susceptibility measurements show decreasing Curie temperature and magnetic moment (μ_a^5T) recorded at 5 T with increasing Ru content from T_C = 295 K and μ_a^5T = 3.35 μ_B (FeRh₅RuB₃) to T_C = 205 K and μ_a^5T = 0.70 μ_B (FeRhRu₅B₃). The measured coercivities lie between 1.0 and 2.2 kA/m indicating soft to semihard magnetic materials.