Journal
PHYSICAL REVIEW B
Volume 80, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.134523
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Funding
- U.S. Department of Energy-Basic Energy Sciences [DE-AC02-07CH11358]
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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.
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