Synthesis and Electronic Properties of TlFe2Se2-δ
TlFe2Se2-δ was synthesized by a self-flux method with excess amount of selenium. Elemental analysis using energy-dispersive X-ray spectroscopy estimates the deficiency δ at about 0.5. The magnetic susceptibility reveals an antiferromagnetic transition at TN ≈ 475 K. The resistivity exhibits a semiconducting behavior with an activation energy, EA = 0.04 eV. There is a clear anomaly in the resistivity at TN, indicating a strong interplay between magnetism and electric conduction.
J.-L. Bobet, B. Chevalier and D. Fruchart
S. Horiguchi et al., "Synthesis and Electronic Properties of TlFe2Se2-δ", Solid State Phenomena, Vol. 170, pp. 47-50, 2011