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

TitleAnisotropic thermal expansion of Fe1.06Te and FeTe0.5Se0.5 single crystals
Publication TypeJournal Article
Year of Publication2009
AuthorsBud'ko SL, Canfield PC, Sefat AS, Sales BC, McGuire MA, Mandrus D
Journal TitlePhysical Review B
Volume80
Pages134523
Date Published10/01
ISBN Number1098-0121
Accession NumberISI:000271351300102
Keywordssuperconductivity
Abstract

Heat capacity and anisotropic thermal expansion was measured for Fe1.06Te and FeTe0.5Se0.5 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 FeTe0.5Se0.5 inferred from the Ehrenfest relation have opposite signs for in-plane and c-axis pressures. The Gruneisen parameters for both materials are similar and only weakly temperature dependent above similar to 80 K.

URL<Go to ISI>://000271351300102
DOI10.1103/Physrevb.80.134523