Pressure-induced reversible amorphization in superconducting compound FeSe[subscript 0.5]Te[subscript 0.5]

Journal Article · Mon Jun 01 00:00:00 EDT 2009 · High Pressure Res.

DOI:https://doi.org/10.1080/08957950902816885· OSTI ID:1005628

Stemshorn, Andrew K; Vohra, Yogesh K; Wu, Phillip M; Hsu, F C; Huang, Y L; Wu, M K; Yeh, K W

We report pressure-induced amorphization phenomenon in a superconducting compound FeSe0.5Te0.5 toa pressure of 27 GPa in a diamond anvil cell. The synchrotron x-ray diffraction studies reveal that the ambient pressure tetragonal phase (space group P4/nmm) transforms to an amorphous phase at 11.5 GPa during compression and reverts back to the tetragonal phase during decompression at 2.8 GPa. The measured equation of state for the tetragonal phase and the amorphous phase is presented. The disordering of Fe(SeTe)4 tetrahedra under compression is attributed to a kinetic hindrance to a stable phase and is likely to impact its superconducting properties under high pressures.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE
• OSTI ID: 1005628
• Journal Information: High Pressure Res., Journal Name: High Pressure Res. Journal Issue: (2) ; 06, 2009 Vol. 29; ISSN 0895-7959; ISSN HPRSEL
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
COMPRESSION
DIAMONDS
EQUATIONS
EQUATIONS OF STATE
IRON COMPOUNDS
KINETICS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
PRESSURE RANGE MEGA PA 10-100
SPACE
SUPERCONDUCTIVITY
SYNCHROTRON RADIATION
TRIOCTYLAMINE
X-RAY DIFFRACTION