Fermi surface and magnetic structure of TmGa3.
We carry out measurements of the two-dimensional angular correlation of the positron annihilation radiation (2D-ACAR) to reconstruct the complex multisheet Fermi surface (FS) of the cubic rare-earth (RE) compound TmGa3. We discover a correlation between the antiferromagnetic structures and the nesting of the FS along the [110] directions. Moreover, we propose methods to estimate the density of states at the Fermi energy ( EF) and the electronic contribution to the specific heat [we obtain N(EF) = 13.6 states/Ryd cell and gamma = 2.4 mJ/mole K2].
Biasini
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ENEA, Via Don Fiammelli 2, 40129 Bologna, Italy.
Kontrym-Sznajd
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Monge
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Gemmi
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Czopnik
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Jura
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