Conductivity of La 0.75Sr0.25BO3 perovskite-type oxides

POSTER

Abstract

We perform a joint experimental and theoretical study of the conductivity and electronic structures in La$_{0.75}$Sr$_{0.25}A$O$_{3}(A $= Cr, Mn, Fe and Co) with perovskite structure. The samples with pure phase are prepared by the solid reaction. The electrical conductivity measurements indicate that in La$_{0.75}$Sr$_{0.25}A$O$_{3}$ the conductivity orderly increases for Cr, Mn, Fe and Co. The first-principles simulations show that conductivity depends on electronic structure. The d electron increasing in transition metal atoms results in carrier concentration increasing.

*This work was supported in part by National Natural Science Foundation of China (Grant No.50272009, 50572024), and NSF-PREM program (Grant No. 0351449)

Authors

  • Ning Chen

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • Yun Kang

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • Yang Li

    • Department of Engineering Science and Materials, University of Puerto Rico at Mayaguez, PR 00681, USA

  • Fushen Li

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • Lifen Li

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China