Electrical properties of the Sr2Ru1−xTixO4 solid solutions

✍ Scribed by K. Miwa; I. Kagomiya; H. Ohsato; H. Sakai; Y. Maeda

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 381 KB
• Volume: 27
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2007.02.146

✦ Synopsis

The Sr 2 Ru 1-x Ti x O 4 solid solution with the K 2 NiO 4 -type structure has been prepared by a conventional solid-state reaction method. The lattice constants of Sr 2 Ru 1-x Ti x O 4 refined by the whole-powder-pattern-decomposition (WPPD) method have increased a-axis and decreased c-axis with the substitution of Ti 4+ for Ru 4+ . The change from metal to semi-conducting behavior has been confirmed between x = 0.2 and 0.4. Seebeck coefficient Q is positive for x = 0, 0.2, 0.4, 0.6 and 0.8. In addition, a large difference of Seebeck coefficient has been observed below 326.84 • C between x = 0.4 and 0.6. The electronic states of Sr 2 RuO 4 have been covered to the Ru 4d state surrounding of Fermi level widely calculated by DV X␣ method. The energy band gap of Sr 2 TiO 4 have observed between the O 2p state and Ti 3d state. The experimental conductive behavior has been supported by DV X␣ simulation results.