Anisotropic thermal expansion of Fe1.06Te and FeTe.5Se.5 single crystals
Journal Article
·
· Physical Review B
- Ames Laboratory
- Oak Ridge National Laboratory (ORNL)
- ORNL
Heat capacity and anisotropic thermal expansion was measured for Fe{sub 1.06}Te and FeTe{sub 0.5}Se{sub 0.5} 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 FeTe{sub 0.5}Se{sub 0.5} inferred from the Ehrenfest relation have opposite signs for in-plane and c-axis pressures. The Grueneisen parameters for both materials are similar and only weakly temperature dependent above -80 K.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 979258
- Journal Information:
- Physical Review B, Vol. 80, Issue 13; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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