Interlayer Ions Control Spin Canting in Low-Dimensional Manganese Trimers in 12R-Ba4MMn3O12 (M = Ce, Pr) Layered
Corlyn E Regier1, Shaun O'Donnell2, Anuj Goyal2,3
1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States.
Inorganic Chemistry
|December 7, 2024
Summary
Researchers studied magnetic hexagonal perovskites, 12R-Ba4MMn3O12. They found that magnetic interlayer cations alter spin orientation, impacting magnetic properties and providing insights for designing new magnetic materials.
Area of Science:
- Materials Science
- Solid State Physics
- Magnetism
Background:
- Understanding structure-property relationships is crucial for designing materials with specific magnetic properties.
- The magnetism of layered hexagonal perovskites, specifically the 12R-Ba4MMn3O12 family, is not well understood.
- This study focuses on the 12R-Ba4MMn3O12 family with M = Ce4+ (diamagnetic) and M = Pr4+ (paramagnetic).
Purpose of the Study:
- To perform a detailed magnetostructural study of 12R-Ba4MMn3O12 materials.
- To elucidate the relationship between crystal structure, electronic structure, and magnetic properties.
- To determine the magnetic structure of these compounds.
Main Methods:
- Variable-temperature powder neutron diffraction to determine magnetic structures.
- Powder X-ray diffraction for crystal structure analysis.
- X-ray absorption spectroscopy and first-principles calculations for electronic structure characterization.
Main Results:
- The Ce-based material is antiferromagnetic below 7.75 K.
- The Pr-based material shows complex magnetic behavior with a net moment below 200 K and an antiferromagnetic transition at 12.15 K.
- Magnetic interlayer cations induce an out-of-plane canting of spins within the Mn3O12 trimers.
Conclusions:
- The study provides a detailed picture of the magnetic, crystal, and electronic structures of 12R-Ba4MMn3O12.
- The findings offer insights into the magnetism of layered hexagonal perovskites.
- This work serves as a foundation for understanding and designing related magnetic materials.
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