Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Effects of Site and Magnetic Disorder on the Oxygen Vacancy Formation and Electronic and Optical Properties of LaxSr1–xCoO3–δ and SrFeyCo1–yO3–δ [plus supplemental information]

Journal Article · · Journal of Physical Chemistry. C

Disorder is an inevitable issue in practical applications of perovskites with the A-site occupied by La/Sr and the B-site occupied by Co/Fe. We performed density functional theory calculations to reveal the site and magnetic disorder effect on the oxygen vacancy formation and the electronic and optical properties of LaxSr1–xCoO3–δ and SrFeyCo1–yO3–δ systems. Generally, site disorder has little influence on the physical properties we studied, while magnetic disorder has a property-dependent effect for La A-site and Fe B-site doping of SrCoO3. Compared to ordered ferromagnetic (FM) calculations, disordered paramagnetic (PM) results can better describe the high-temperature behavior of lattice expansion and the multiple spin states of Co ions in LaxSr1–xCoO3. The oxygen vacancy formation energy results show that the magnetic disorder has a more remarkable effect on SrFeyCo1–yO3–δ systems with a robust magnetic order than that on the LaxSr1–xCoO3–δ systems with a fragile magnetic order. The electronic structures in the PM phase have less spin polarization and broadened bands, by which the optical absorptions from the single spin channel transition in the FM phase have an obvious change in the magnitude and/or the trend. Furthermore, our work provides guidance for where and why to consider the disorder.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
OSTI ID:
1821389
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 22 Vol. 125; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (42)

Ferromagnetic Properties of SrFe1−xCoxO3Synthesized under High Pressure journal January 1996
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Effective Ca2+-doping in Sr1-xCaxFeO3-δ oxygen carriers for chemical looping air separation: A theoretical and experimental investigation journal January 2021
Efficient stochastic generation of special quasirandom structures journal September 2013
Enlightening the stable ferromagnetic phase of SrAO3(A= Cr, Fe and Co) compounds using spin polarized quantum mechanical approach journal February 2020
Stability and performance of infiltrated La0.8Sr0.2CoxFe1−xO3 electrodes with and without Sm0.2Ce0.8O1.9 interlayers journal July 2011
Electronic structural, optical and phonon lattice dynamical properties of pure- and La-doped SrTiO 3 : An ab initio thermodynamics study journal December 2017
Porous microstructure modification of La1−xSrxCoO3 (0≤x≤1) ceramics via Sr content journal May 2012
Ab Initio DFT+U Analysis of Oxygen Vacancy Formation and Migration in La 1-x Sr x FeO 3-δ ( x = 0, 0.25, 0.50) journal July 2013
La 0.6 Sr 0.4 Co 1− y Fe y O 3−δ Perovskites: Influence of the Co/Fe Atomic Ratio on Properties and Catalytic Activity toward Alcohol Steam-Reforming journal March 2008
Hydrothermal Fabrication and Catalytic Properties of La 1- x Sr x M 1- y Fe y O 3 (M = Mn, Co) That Are Highly Active for the Removal of Toluene journal April 2010
Origin of band gaps in 3d perovskite oxides journal April 2019
Formation and migration of oxygen vacancies in La 1−x Sr x Co 1−y Fe y O 3−δ perovskites: insight from ab initio calculations and comparison with Ba 1−x Sr x Co 1−y Fe y O 3−δ journal January 2013
Oxygen vacancy formation characteristics in the bulk and across different surface terminations of La (1−x) Sr x Fe (1−y) Co y O (3−δ) perovskite oxides for CO 2 conversion journal January 2016
First-principles study on the electronic, optical and thermodynamic properties of ABO 3 (A = La,Sr, B = Fe,Co) perovskites journal January 2017
Polaron size and shape effects on oxygen vacancy interactions in lanthanum strontium ferrite journal January 2017
The influence of oxygen vacancy on the electronic and optical properties of ABO 3−δ (A = La, Sr, B = Fe, Co) perovskites journal January 2019
Theoretical study of the optical and thermodynamic properties of La x Sr 1−x Co 1−y Fe y O 3−δ ( x / y = 0.25, 0.5, 0.75) perovskites journal January 2019
The optimal co-doping of SrFe 1−x Co x O 3−δ oxygen carriers in redox applications journal January 2020
A Localized‐Electron to Collective‐Electron Transition in the System (La, Sr)CoO 3 journal February 1968
Density-Functional-Theory Modeling of Cation Diffusion in Bulk La 1 − x Sr x MnO 3 ± δ ( x = 0.0 – 0.25 ) for Solid-Oxide Fuel-Cell Cathodes journal October 2017
Mott gapping in 3 d A B O 3 perovskites without Mott-Hubbard interelectronic repulsion energy U journal July 2019
Special points for Brillouin-zone integrations journal June 1976
Ab initiomolecular dynamics for liquid metals journal January 1993
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Structural details and magnetic order of La 1 − x Sr x CoO 3 ( x <~ 0 . 3 ) journal January 1999
Correlation of local Jahn-Teller distortions to the magnetic/conductive states of La 1 − x Sr x CoO 3 journal October 1999
X-ray absorption of the negative charge-transfer material SrFe 1 − x Co x O 3 journal April 2002
Glassy ferromagnetism and magnetic phase separation in La 1 − x Sr x CoO 3 journal May 2003
Linear optical properties in the projector-augmented wave methodology journal January 2006
Oxidation energies of transition metal oxides within the GGA + U framework journal May 2006
Specific-heat evidence of strong electron correlations and thermoelectric properties of the ferromagnetic perovskite Sr Co O 3 − δ journal November 2006
GGA + U calculations of correlated spin excitations in LaCoO 3 journal January 2009
Ab initio energetics of La B O 3 ( 001 ) ( B = Mn , Fe, Co, and Ni) for solid oxide fuel cell cathodes journal December 2009
Effect of magnetic disorder and strong electron correlations on the thermodynamics of CrN journal November 2010
First-principles DFT + U modeling of actinide-based alloys: Application to paramagnetic phases of UO 2 and (U,Pu) mixed oxides journal May 2013
Polymorphous band structure model of gapping in the antiferromagnetic and paramagnetic phases of the Mott insulators MnO, FeO, CoO, and NiO journal January 2018
Special quasirandom structures journal July 1990
Generalized Gradient Approximation Made Simple journal October 1996
Tuning the magnetism of epitaxial cobalt oxide thin films by electron beam irradiation journal July 2017
Perovskites in catalysis and electrocatalysis journal November 2017

Similar Records

Water electrolysis on La1-xSrxCoO3-δ perovskite electrocatalysts
Journal Article · Wed Mar 23 00:00:00 EDT 2016 · Nature Communications · OSTI ID:1261341

Theoretical study of the optical and thermodynamic properties of LaxSr1-xCo1-yFeyO3-δ (x/y = 0.25, 0.5, 0.75) perovskites
Journal Article · Sun Nov 03 23:00:00 EST 2019 · Physical Chemistry Chemical Physics. PCCP · OSTI ID:1607750