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Emergent frustration in co-doped β-Mn
Joseph A M Paddison1, J Ross Stewart, Pascal Manuel
1Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom.
This study explores low-temperature spin correlations in metallic frustrated magnets. Researchers found persistent magnetic scattering and no magnetic order, revealing an emergent spin structure mimicking a key frustrated magnetism model.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Frustrated magnets exhibit complex magnetic behaviors due to competing interactions.
- Understanding low-temperature spin correlations is crucial for characterizing magnetic order and emergent phenomena.
Purpose of the Study:
- To investigate low-temperature spin correlations in the metallic frustrated magnet β-Mn1-xCox.
- To determine the nature of magnetic order and interactions in this material down to very low temperatures.
Main Methods:
- Single-crystal polarized-neutron scattering experiments were performed.
- Reverse Monte Carlo refinements and mean-field theory calculations were employed.
Main Results:
- Highly structured magnetic diffuse scattering persisted down to 0.05 K.
- No periodic magnetic order was observed at the lowest temperatures.
- An effective Hamiltonian was constructed, describing an emergent spin structure.
Conclusions:
- The identified interactions in β-Mn1-xCox mimic the canonical triangular lattice antiferromagnet model.
- This suggests a complex, non-collinear magnetic state in the metallic frustrated magnet.
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