Magnetic Properties of the U2Fe17-xMxCy Intermetallic Compounds with M = Al, Si, and Ge

✍ Scribed by B. Chevalier; P. Rogl; J. Etourneau

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 205 KB
• Volume: 115
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1995.1096

✦ Synopsis

" (\mathrm{U}{2} \mathrm{Fe}{17}) " does not exist in thermodynamic equilibrium; however, alloying uranium with electron donor elements such as (\mathrm{Al}, \mathrm{Si}), or Ge yields compound formation with crystal structures isotypic with the (\mathrm{Th}{2} \mathrm{Ni}{17})-type or derivative structures such as (U_{2} \mathrm{Fe}{12.8} \mathrm{Si}{4.2}). The octahedral voids can be partially filled with carbon atoms without exceeding one carbon atom per formula unit. Powder (\mathrm{X})-ray diffraction of the carbon-containing compounds in all cases revealed the (\mathrm{Th}{2} \mathrm{Ni}{17})-type of structure with a small increase in volume by (\sim 0.0075 \mathrm{~nm}^{3}) per interstitial carbon atom per formula unit. There is only a small influence of the carbon-induced volume increase on the ferromagnetic ordering temperature of the alloys. (c) 1995 Academic Press, Inc.