[13p-B408-1~16] 11.1 Fundamental properties

[13p-B408-1] Effect of Alkaline Earth Metal Substitution on New Iridium Oxyfluoride

〇Kenta Kuramochi^1,2, Tomohito Shimano^1,2, Taichiro Nishio¹, Tomoki Uchiyama³, Yoshiharu Uchimoto³, Hirotaka Okabe⁴, Akihiro Koda⁴, Kazumasa Horigane⁵, Jun Akimitsu⁵, Hiraku Ogino² (1.Tokyo Univ. of Science, 2.AIST, 3.Kyoto Univ., 4.KEK, 5.Okayama Univ.)

Keywords:mixed-anion compounds, layered iridium compounds, topochemical reaction

Layered iridate A₂IrO₄ (A = Sr, Ba) has drawn considerable attention due to interesting physical properties, and furthermore, it has been theoretically proposed that unconventional superconductivity is induced by carrier-doping for A₂IrO₄. So far, we have successfully synthesized a layered iridium oxyfluoride Sr₂Ir(O,F)_6-δ using topochemical reaction method. This time, we report synthesis and physical properties of a new layered iridium oxyfluoride Ba₂Ir(O,F)_6-δ and discuss a variation of Ir valence and physical properties between Sr and Ba system.