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

Topotactic Reduction‐Driven Crystal Field Excitations in Brownmillerite Manganite Thin Films

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [4];  [1];  [2];  [2];  [5]
  1. University of Science and Technology of China, Hefei (China)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  3. Southern University of Science and Technology (SUSTech), Shenzhen (China); Sun Yat‐sen University, Shenzhen (China)
  4. Anhui University, Hefei (China)
  5. University of Science and Technology of China, Hefei (China); Anhui University, Hefei (China); Chinese Academy of Sciences (CAS), Hefei (China)
Topotactic reduction of perovskite oxides offers a powerful approach for discovering novel phenomena, such as superconducting infinite-layer nickelates and polar metallicity, and is commonly accompanied by the emergence of multiple valence states and/or complex crystal fields of transition metals. However, understanding the complex interplay between crystal chemistry, electronic structure, and physical properties at the spin- and orbital-resolved levels in these reduced systems remains elusive. Here, in this study, x-ray absorption spectroscopy, resonant inelastic x-ray scattering (RIXS), and density functional theory calculations are used to uncover topotactic metal-insulator transition and orbital-specific crystal field excitations in brownmillerite La0.67Ca0.33MnO2.5 thin films. The Mn valence states are found to be Mn2+/Mn3+, along with their corresponding populations at octahedral and tetrahedral sites, which effectively weaken the Mn-O hybridization compared to the parent perovskite phase. As a result, La0.67Ca0.33MnO2.5 films exhibit an antiferromagnetic insulating ground state. Moreover, by combining the RIXS measurements on selected single-valence manganites, specifically MnO, LaMnO3, and CaMnO3, with orbital- and spin-resolved density-of-states calculations, the study identifies the dd excitations of octahedrally and tetrahedrally coordinated Mn2+/Mn3+ ions, directly linking the microscopic electronic structure to the macroscopic magnetic/electrical properties.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
Guangdong Innovative and Entrepreneurial Research Team Program; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Natural Science Foundation of Anhui Province; Natural Science Foundation of Guangdong Province; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
SC0012704
OSTI ID:
2525844
Report Number(s):
BNL--227627-2025-JAAM
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 28 Vol. 35; ISSN 1616-301X; ISSN 1616-3028
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (52)

Versatile and Highly Efficient Controls of Reversible Topotactic Metal–Insulator Transitions through Proton Intercalation journal September 2019
Topotactic Transition: A Promising Opportunity for Creating New Oxides journal June 2023
Epitaxial Oxygen Getter for a Brownmillerite Phase Transformation in Manganite Films journal January 2011
Structure and Properties of Functional Oxide Thin Films: Insights From Electronic-Structure Calculations journal July 2011
Topotactic Phase Transformation of the Brownmillerite SrCoO 2.5 to the Perovskite SrCoO 3- δ journal July 2013
Electron-Beam-Induced Perovskite-Brownmillerite-Perovskite Structural Phase Transitions in Epitaxial La 2/3 Sr 1/3 MnO 3 Films journal February 2014
Topotactic Metal-Insulator Transition in Epitaxial SrFeO x Thin Films journal July 2017
Reversible Control of Physical Properties via an Oxygen-Vacancy-Driven Topotactic Transition in Epitaxial La 0.7 Sr 0.3 MnO 3− δ Thin Films journal December 2018
Topotactic Phase Transition Driving Memristive Behavior journal August 2019
Magnetic Structure and Electronic Study of Complex Oxygen‐Deficient Manganites journal August 2008
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
In-situ investigation on the oxygen vacancy-driven topotactic phase transition in charge-orbital ordered Nd0.5Sr0.5MnO3 films journal February 2023
Atomic-scale observation of strain-dependent reversible topotactic transition in La0.7Sr0.3MnOx films under an ultra-high vacuum environment journal December 2022
Synthesis and Structural Characterization of La 1− x A x MnO 2.5 (A = Ba, Sr, Ca) Phases: Mapping the Variants of the Brownmillerite Structure journal November 2009
Infinite-layer iron oxide with a square-planar coordination journal December 2007
Electric-field control of tri-state phase transformation with a selective dual-ion switch journal May 2017
Direct observation of oxygen vacancy-driven structural and resistive phase transitions in La2/3Sr1/3MnO3 journal February 2017
Emergent phenomena at oxide interfaces journal January 2012
Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge journal August 2013
Symmetry mismatch-driven perpendicular magnetic anisotropy for perovskite/brownmillerite heterostructures journal May 2018
Electronic structure of the parent compound of superconducting infinite-layer nickelates journal January 2020
Superconductivity in a quintuple-layer square-planar nickelate journal November 2021
Absence of 3a0 charge density wave order in the infinite-layer nickelate NdNiO2 journal January 2024
A correlated ferromagnetic polar metal by design journal April 2024
Current-driven dynamics and ratchet effect of skyrmion bubbles in a ferrimagnetic insulator journal July 2022
Superconductivity in an infinite-layer nickelate journal August 2019
Geometric frustration of Jahn–Teller order in the infinite-layer lattice journal February 2023
Signatures of superconductivity near 80 K in a nickelate under high pressure journal July 2023
Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering journal June 2017
Single-crystal epitaxial thin films of SrFeO2 with FeO2 “infinite layers” journal April 2008
Reversible changes of epitaxial thin films from perovskite LaNiO3 to infinite-layer structure LaNiO2 journal February 2009
Lattice mismatch accommodation via oxygen vacancy ordering in epitaxial La 0.5 Sr 0.5 CoO 3-δ thin films journal July 2013
Labyrinth-type domain structure of heteroepitaxial SrMnO 2.5 film journal June 2013
Oxygen vacancies: The (in)visible friend of oxide electronics journal March 2020
Strain-driven formation of epitaxial nanostructures in brownmillerite strontium cobaltite thin films journal March 2023
Projector augmented-wave method journal December 1994
Density-functional theory and strong interactions: Orbital ordering in Mott-Hubbard insulators journal August 1995
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Resonant inelastic x-ray scattering study of the hole-doped manganites La 1 − x Sr x MnO 3 ( x = 0.2 , 0.4) journal December 2004
Mn valence instability in La 2 ∕ 3 Ca 1 ∕ 3 Mn O 3 thin films journal March 2006
Assessing the Perdew-Burke-Ernzerhof exchange-correlation density functional revised for metallic bulk and surface systems journal May 2008
Theoretical analysis of resonant inelastic x-ray scattering spectra in LaMnO 3 journal October 2008
Jahn-Teller distortion and magnetic structure in LaMnO 3 : A first-principles theoretical study with full structure optimizations journal July 2010
Multiplet ligand-field theory using Wannier orbitals journal April 2012
Strain-controlled oxygen vacancy formation and ordering in CaMnO 3 journal August 2013
Crystal structure and electronic properties of bulk and thin film brownmillerite oxides journal November 2015
d − d Excitations in Manganites Probed by Resonant Inelastic X-Ray Scattering journal February 2005
Orientation control of oxygen vacancy channels in brownmillerite SrFe O 2.5 journal January 2020
Effects of dimensionality on the electronic structure of Ruddlesden-Popper chromates Srn+1CrnO3n+1 journal July 2024
Resonant inelastic x-ray scattering studies of elementary excitations journal June 2011
Magnetic excitations in infinite-layer nickelates journal July 2021
Reversible oxygen migration and phase transitions in hafnia-based ferroelectric devices journal May 2021

Similar Records

The synthesis and complex anion-vacancy ordered structure of La{sub 0.33}Sr{sub 0.67}MnO{sub 2.42}
Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry · OSTI ID:21580152

Charge and structural ordering in the brownmillerite phases: La{sub 1-x}Sr{sub x}MnO{sub 2.5} (0.2<x<0.4)
Journal Article · Mon May 15 00:00:00 EDT 2006 · Journal of Solid State Chemistry · OSTI ID:20785000

Reversible control of magnetism in La0.67Sr0.33MnO3 through chemically-induced oxygen migration
Journal Article · Sun Feb 21 19:00:00 EST 2016 · Applied Physics Letters · OSTI ID:1418493

Related Subjects