[8p-N201-1~14] 9.5 New functional materials and new phenomena

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[8p-N201-1] Electronic State Analysis of Layered Oxide Sr_2.5(Bi_1-xPb_x)_0.5NiO₅ Correlating Local Atomic Arrangement and Electrical Conductivity

〇(M1)Kenta Natsui¹, Hideyuki Kawasoko¹, Soichi Kikkawa¹, Kana Nishimura², Tomoteru Fukumura^2,3, Seiji Yamazoe¹ (1.Tokyo Metropolitan Univ., 2.Tohoku Univ., 3.AIMR)

Keywords:

Transition metal oxide,Local atomic arrangement,X-ray Absorption Fine Structure

The layered oxide Sr_2.5Bi_0.5NiO₅ exhibits a 100-fold increase in electrical conductivity due to a change in the Sr/Bi arrangement in the rock salt layer from a disordered to an ordered state. Additionally, in the Pb-substituted Sr_2.5(Bi_1-xPb_x)_0.5NiO₅, electrical conductivity varies in correlation with the degree of the Sr/Bi ordering. In this study, we evaluated the electronic states using X-ray absorption fine structure analysis and investigated the origin of these phenomena.