Correlation of structural and electrical properties of PrBaCo2O5+δ thin films at high temperature

Journal of Materiomics

卷:4

Aiping Chen¹  Erik Enriquez¹  Quanxi Jia²  Zach Harrell³  Chonglin Chen³  Brennan Mace³  Xing Xu³ 

[1] Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA;

[2] Department of Materials Design and Innovation, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;

[3] Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USA;

关键词: High temperature;    Physical properties;    Complex oxide;    Oxygen vacancy;    Lattice structures;   

DOI  :  10.1016/j.jmat.2017.12.003

来源: DOAJ

【 摘 要 】

Epitaxial PrBaCo2O5+δ (PBCO, 0≤ δ ≤ 1) thin films were deposited by pulsed laser deposition. The structural and electrical properties of the films were characterized at high temperatures in reduced environments. X-ray diffraction scans at high temperature in reduced environment show potential structural transitions of PBCO as evidenced by both a large (Δl = 0.335 nm) expansion of the out-plane (c-axis) lattice, due to thermal and chemical expansion, and a step in the expansion of the c-axis lattice parameter. These transitions indicate the presence of oxygen vacancy ordering as the oxygen content in the films is reduced. Resistivity measurements under the same environments also show evidence of sharp transitions related with the structural transformations. This study helps the understanding of the structure-property relationship of PBCO at high temperature and provides important technological information to utilize these materials for solid oxide fuel cell at intermediate temperatures.

【 授权许可】

Unknown