We investigated the physical properties of TlFe2−xSe2 single crystals. The resistivity of TlFe2−xSe2 shows typical semiconductor behavior with an activation energy of 25 meV. DC susceptibility indicates an antiferromagnetic transition at about 450 K. Reentrant spin-glass (RSG) behavior was found at about 130 K through DC and AC magnetic measurements. The RSG behavior suggests the existence of a strong competition between ferromagnetic (FM) and antiferromagnetic (AFM) interactions due to Fe deficiencies. Strong electron-electron correlation may exist in this material and it is possibly a candidate of parent compound for high Tc superconductors.
@article{arxiv.1012.2929,
title = {Reentrant spin-glass behavior in $TlFe_{2-x}Se_2$ with the $ThCr_2Si_2$-type structure},
author = {J. J. Ying and A. F. Wang and Z. J. Xiang and X. G. Luo and R. H. Liu and X. F. Wang and Y. J. Yan and M. Zhang and G. J. Ye and P. Cheng and X. H. Chen},
journal= {arXiv preprint arXiv:1012.2929},
year = {2010}
}
Comments
5 pages, 6 figures, submitted to PRB on 12 Nov 2010