Double-Exchange Magnetic Interactions in High-Temperature Ferromagnetic Iron Chalcogenide Monolayers
Sourabh Kumar1, Chiranjit Mondal2, Biswarup Pathak1,2
1Discipline of Chemistry, Indian Institute of Technology (IIT), Indore, Indore, 453552, India.
Summary
Smythite, an iron chalcogenide, exhibits strong ferromagnetic coupling due to its unique lattice structure. Applied mechanical stress significantly enhances its Curie temperature, revealing insights into double exchange mechanisms for spintronic applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Smythite () is an iron-based chalcogenide with a lamellar structure.
- Transition metal chalcogenides are promising for low-cost spintronic devices due to natural abundance.
Purpose of the Study:
- Investigate charge transfer processes in 2D smythite.
- Analyze complex magnetic ordering and its influence on material properties.
Main Methods:
- Computational studies using molecular and periodic approaches.
- Analysis of redox couple effects and magnetic interactions.
- Examination of mechanical stress impact on magnetic properties.
Main Results:
- The redox couple and magnetic ordering govern charge transfer.
- Strong ferromagnetic coupling observed, attributed to three Fe-centers.
- Mechanical stress increases Curie temperature via double exchange interaction.
Conclusions:
- Smythite exhibits a strong ferromagnetic ordering driven by the redox couple.
- Jahn-Teller distortion confirmed by spin-orbit coupling analysis.
- The study provides insights into double exchange mechanisms in smythite for spintronics.
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