Paper Title:

Synthesis and Electronic Properties of TlFe2Se2-δ

Periodical Solid State Phenomena (Volume 170)
Main Theme Solid Compounds of Transition Elements
Edited by J.-L. Bobet, B. Chevalier and D. Fruchart
Pages 47-50
DOI 10.4028/www.scientific.net/SSP.170.47
Citation Satoshi Horiguchi et al., 2011, Solid State Phenomena, 170, 47
Online since April, 2011
Authors Satoshi Horiguchi, Hirohiko Sato, Norio Umeyama, Yoshiaki Hara, Nobuaki Miyakawa, Kouichi Takase, Shinichi Ikeda
Keywords Antiferromagnetism, Iron Chalcogenide, Iron-Based Superconductor, Mott-Insulator, Semiconductor
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Abstract

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.