Magnetic properties of lanthanide rhenium oxides Ln3ReO7 (Ln=Sm, Eu, Ho)

✍ Scribed by Makoto Wakeshima; Yukio Hinatsu

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 362 KB
• Volume: 179
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2006.07.033

✦ Synopsis

Ternary lanthanide rhenium oxides Ln 3 ReO 7 (Ln ¼ Sm, Eu, Ho) were prepared and their structures were determined by X-ray diffraction measurements. They crystallize in an orthorhombic superstructure of cubic fluorite (space group Cmcm for Ln ¼ Sm, Eu; C222 1 for Ln ¼ Ho). The magnetic properties were characterized by magnetic susceptibility and specific heat measurements from 1.8 to 400 K. The Sm 3 ReO 7 shows an antiferromagnetic transition at 1.9 K. The Eu 3 ReO 7 indicates a magnetic anomaly at 12 K. On the other hand, the results of the specific heat measurements indicate that both Sm 3 ReO 7 and Eu 3 ReO 7 undergo a structure transition at 270 and 350 K, respectively. The Ho 3 ReO 7 is paramagnetic down to 1.8 K.