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 7 GPa. 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.This article is published as Petrovic, C., Y. Lee, T. Vogt, N. Dj Lazarov, S. L. Bud’ko, and P. C. Canfield. "Kondo insulator description of spin state transition in Fe Sb 2." Physical Review B 72, no. 4 (2005): 045103.
DOI: 10.1103/PhysRevB.72.045103.
Copyright 2005 American Physical Society.
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