Kondo Insulator description of spin state transition in FeSb2

Abstract

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.

Physical Review B in press (2005)

References in corpus (2)

• Anisotropy and large magnetoresistance in narrow gap semiconductor FeSb2
• Compressibility and Electronic Structure of MgB2 up to 8 GPa

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