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Title: Role of temperature and oxygen content on structural and electrical properties of LaBaCo 2O 5+δ thin films

Here, the role of temperature and the oxygen content in the structural transformation and electrical conductivity of epitaxial double perovskite LaBaCo 2O 5+δ (0≤ δ ≤ 1) thin films was systematically investigated. Reciprocal space mapping and ω-2θ x-ray diffraction performed at different temperatures in vacuum indicate that oxygen vacancies in the films become ordered at high temperature in a reducing environment. The changes of the oxygen content and the degree of oxygen vacancy ordering in the films result in a strong in-plane anisotropic lattice deformation and a large thermal expansion coefficient along the c-axis direction. The electrical conductivity measurements reveal that these behaviors are related to the degree of oxygen vacancy formation and lattice deformation in the films.
Authors:
 [1] ; ORCiD logo [1] ;  [1] ; ORCiD logo [2] ; ORCiD logo [2] ;  [3]
  1. Univ. of Texas at San Antonio, San Antonio, TX (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. at Buffalo–the State Univ. of New York, Buffalo, NY (United States)
Publication Date:
Report Number(s):
LA-UR-18-28582
Journal ID: ISSN 0003-6951
Grant/Contract Number:
AC52-06NA25396; AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 7; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1471370
Alternate Identifier(s):
OSTI ID: 1421308

Mace, Brennan, Harrell, Zach, Chen, Chonglin, Enriquez, Erik, Chen, Aiping, and Jia, Quanxi. Role of temperature and oxygen content on structural and electrical properties of LaBaCo2O5+δ thin films. United States: N. p., Web. doi:10.1063/1.5009245.
Mace, Brennan, Harrell, Zach, Chen, Chonglin, Enriquez, Erik, Chen, Aiping, & Jia, Quanxi. Role of temperature and oxygen content on structural and electrical properties of LaBaCo2O5+δ thin films. United States. doi:10.1063/1.5009245.
Mace, Brennan, Harrell, Zach, Chen, Chonglin, Enriquez, Erik, Chen, Aiping, and Jia, Quanxi. 2018. "Role of temperature and oxygen content on structural and electrical properties of LaBaCo2O5+δ thin films". United States. doi:10.1063/1.5009245.
@article{osti_1471370,
title = {Role of temperature and oxygen content on structural and electrical properties of LaBaCo2O5+δ thin films},
author = {Mace, Brennan and Harrell, Zach and Chen, Chonglin and Enriquez, Erik and Chen, Aiping and Jia, Quanxi},
abstractNote = {Here, the role of temperature and the oxygen content in the structural transformation and electrical conductivity of epitaxial double perovskite LaBaCo2O5+δ (0≤ δ ≤ 1) thin films was systematically investigated. Reciprocal space mapping and ω-2θ x-ray diffraction performed at different temperatures in vacuum indicate that oxygen vacancies in the films become ordered at high temperature in a reducing environment. The changes of the oxygen content and the degree of oxygen vacancy ordering in the films result in a strong in-plane anisotropic lattice deformation and a large thermal expansion coefficient along the c-axis direction. The electrical conductivity measurements reveal that these behaviors are related to the degree of oxygen vacancy formation and lattice deformation in the films.},
doi = {10.1063/1.5009245},
journal = {Applied Physics Letters},
number = 7,
volume = 112,
place = {United States},
year = {2018},
month = {2}
}