The thermal expansion and heat capacity of FeSb2 at ambient pressure agrees with a picture of a temperature induced spin state transition within the Fe t_{2g} multiplet. However, high pressure powder diffraction data show no sign of a structural phase transition up to 7GPa. A bulk modulus B=84(3)GPa has been extracted and the temperature dependence of the Gruneisen parameter has been determined. We discuss here the relevance of a Kondo insulator description for this material.
@article{arxiv.cond-mat/0504458,
title = {Kondo Insulator description of spin state transition in FeSb2},
author = {C. Petrovic and Y. Lee and T. Vogt and N. Dj. Lazarov and S. L. Bud'ko and P. C. Canfield},
journal= {arXiv preprint arXiv:cond-mat/0504458},
year = {2009}
}