"Kondo insulator description of spin state transition in FeSb2"
C. Petrovic, Y. Lee, T. Vogt, N.D. Lazarov, S.L. Budko, P.C. Canfield
Physical Review B
Vol.72, No.4, pp.45103, 2005.07
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 t2g 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 Grüneisen parameter has been determined. We discuss here the relevance of a Kondo insulator description for this material.