Infrared absorption and reflectivity of double perovskite Sr2FeWO6

✍ Scribed by Fernando P. de la Cruz; Néstor E. Massa; José Antonio Alonso; Marı́a Jesús Martı́nez-Lope; Marı́a Teresa Casais

• Book ID: 104166330
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 188 KB
• Volume: 127
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/s0038-1098(03)00623-9

✦ Synopsis

In this work we present temperature dependent infrared reflectivity and absorption of Sr 2 FeWO 6 between 700 and 17 K measured from 40 to 10000 cm 21 . The reflectivity spectra show well defined phonon bands peaking at 143, 227, 377 and 625 cm 21 assigned to overlapping vibrational modes split from those active in cubic perovskite. We have also verified that this compound is structurally stable in the whole temperature range and that its optical gap at ,750 cm 21 (95 meV) undergoes only a minor high temperature decrease ascribed to new thermally accessible levels.