skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Anisotropic thermal expansion of Fe 1.06Te and FeTe .5Se .5 single crystals

Abstract

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.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3]
  1. Ames Laboratory
  2. Oak Ridge National Laboratory (ORNL)
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
979258
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 80; Journal Issue: 13; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; MONOCRYSTALS; SPECIFIC HEAT; THERMAL EXPANSION; TRANSITION TEMPERATURE

Citation Formats

Bud'ko, S. L., Canfield, P. C., Sefat, A. S., Sales, Brian C, McGuire, Michael A, and Mandrus, David. Anisotropic thermal expansion of Fe1.06Te and FeTe.5Se.5 single crystals. United States: N. p., 2009. Web. doi:10.1103/PhysRevB.80.134523.
Bud'ko, S. L., Canfield, P. C., Sefat, A. S., Sales, Brian C, McGuire, Michael A, & Mandrus, David. Anisotropic thermal expansion of Fe1.06Te and FeTe.5Se.5 single crystals. United States. doi:10.1103/PhysRevB.80.134523.
Bud'ko, S. L., Canfield, P. C., Sefat, A. S., Sales, Brian C, McGuire, Michael A, and Mandrus, David. Thu . "Anisotropic thermal expansion of Fe1.06Te and FeTe.5Se.5 single crystals". United States. doi:10.1103/PhysRevB.80.134523.
@article{osti_979258,
title = {Anisotropic thermal expansion of Fe1.06Te and FeTe.5Se.5 single crystals},
author = {Bud'ko, S. L. and Canfield, P. C. and Sefat, A. S. and Sales, Brian C and McGuire, Michael A and Mandrus, David},
abstractNote = {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.},
doi = {10.1103/PhysRevB.80.134523},
journal = {Physical Review B},
issn = {1098-0121},
number = 13,
volume = 80,
place = {United States},
year = {2009},
month = {1}
}