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Fermi surface and magnetic structure of TmGa3
M Biasini1, G Kontrym-Sznajd, M A Monge
1ENEA, Via Don Fiammelli 2, 40129 Bologna, Italy.
Physical Review Letters
|June 1, 2001
Summary
We mapped the complex Fermi surface of TmGa3 using 2D-ACAR, revealing a link between antiferromagnetism and Fermi surface nesting. This study estimates the electronic density of states and specific heat contributions.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Rare-earth intermetallic compounds exhibit complex electronic properties.
- Understanding the Fermi surface is crucial for predicting material behavior.
Purpose of the Study:
- To investigate the electronic structure of the cubic rare-earth compound TmGa3.
- To explore correlations between magnetic structure and Fermi surface topology.
Main Methods:
- Utilized two-dimensional angular correlation of positron annihilation radiation (2D-ACAR) spectroscopy.
- Reconstructed the multisheet Fermi surface (FS) of TmGa3.
Main Results:
- Discovered a correlation between antiferromagnetic structures and Fermi surface nesting along [110] directions.
- Estimated the density of states at the Fermi energy (N(EF) = 13.6 states/Ryd cell).
- Calculated the electronic contribution to the specific heat (gamma = 2.4 mJ/mole K2).
Conclusions:
- The study provides detailed insights into the electronic structure of TmGa3.
- The findings link magnetic ordering to electronic properties, relevant for novel material design.