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Kondo Insulator description of spin state transition in FeSb2

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arxiv cond-mat/0504458 v1 pith:FARDS3II submitted 2005-04-18 cond-mat.str-el cond-mat.mtrl-sci

Kondo Insulator description of spin state transition in FeSb2

C. Petrovic , Y. Lee , T. Vogt , N. Dj. Lazarov , S. L. Bud'ko , P. C. Canfield This is my paper
classification cond-mat.str-el cond-mat.mtrl-sci
keywords transitionbeendescriptionfesb2insulatorkondopressurespin
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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