Anisotropic thermal expansion of Fe1.06 Te and FeTe0.5 Se0.5 single crystals

S. L. Bud'Ko, P. C. Canfield, A. S. Sefat, B. C. Sales, M. A. McGuire, D. Mandrus

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Heat capacity and anisotropic thermal expansion was measured for Fe1.06 Te and FeTe0.5 Se0.5 single crystals. Previously reported phase transitions are clearly seen in both measurements. In both cases the thermal expansion is anisotropic. The uniaxial pressure derivatives of the superconducting transition temperature in FeTe0.5 Se0.5 inferred from the Ehrenfest relation have opposite signs for in-plane and c -axis pressures. The Grüneisen parameters for both materials are similar and only weakly temperature dependent above ∼80 K.

Original languageEnglish
Article number134523
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number13
DOIs
StatePublished - Oct 28 2009

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