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06:49
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
Published on: April 12, 2019
Spin state of negative charge-transfer material SrCoO(3)
1Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, Praha 6, 162 53, Czech Republic.
Physical Review Letters
|September 26, 2012
Summary
Density functional theory and dynamical mean-field theory reveal strontium cobalt oxide (SrCoO3) is a ferromagnetic metal. Its magnetic properties stem from a superposition of atomic states, not an intermediate spin state.
Area of Science:
- Solid State Physics
- Materials Science
- Computational Chemistry
Background:
- Strontium cobalt oxide (SrCoO3) is a material with interesting magnetic properties.
- Recent experimental synthesis of SrCoO3 monocrystals provides an opportunity for detailed study.
- Understanding the origin of magnetism in SrCoO3 is crucial for its potential applications.
Purpose of the Study:
- To investigate the electronic structure and magnetic properties of SrCoO3.
- To determine the origin of the local magnetic moment in SrCoO3.
- To explore methods for quantifying magnetic response in solids with local moments.
Main Methods:
- Combined density functional theory (DFT) and dynamical mean-field theory (DMFT) calculations.
- Theoretical modeling of electronic and magnetic properties.
- Analysis of atomic state contributions to magnetism.
Main Results:
- Calculations predict SrCoO3 to be a ferromagnetic metal, consistent with experimental findings.
- The local magnetic moment in SrCoO3 arises from a coherent superposition of atomic states.
- The study provides a framework for quantifying magnetic response attribution.
Conclusions:
- The electronic structure and magnetic behavior of SrCoO3 are well described by DFT+DMFT.
- The origin of magnetism is clarified, ruling out the intermediate spin state hypothesis.
- The findings offer insights into the nature of local moments in complex oxides.
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