Correlation between superconductivity and structural properties under high pressure of iron pnictide superconductor Ce[subscript 0.6]Y[subscript 0.4]FeAsO[subscript 0.8]F[subscript 0.2]

Journal Article · Tue Feb 28 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3681805· OSTI ID:1035710

Kanagaraj, M; Arumugam, S; Kumar, Ravhi S; Selvan, N.R. Tamil; Muthu, S Esakki; Prakash, J; Thakur, Gohil S; Yoshino, H; Murata, K; Matsubayashi, K; Uwatoko, Y; Sinogeikin, S; Cornelius, Andrew; Ganguli, A K; Zhao, Yusheng ^[1]

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1. IIT-India

We report here the pressure dependence of the electrical resistivity and magnetic susceptibility of polycrystalline Ce{sub 0.6}Y{sub 0.4}FeAsO{sub 0.8}F{sub 0.2} superconductor in the temperature range 4 K to 300 K up to 8 GPa. In-situ high pressure-low temperature x-ray diffraction was performed at 8 K up to 32 GPa using synchrotron x-rays with helium pressure medium. The results show that the applied pressure slightly increases the T{sub c} up to 1 GPa and then it decreases on further pressure increase. The reduction of superconducting transition temperature occurs with a transition to a collapsed tetragonal phase and may be associated with a possible valence change of Ce.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: FOREIGN
• OSTI ID: 1035710
• Journal Information: Applied Physics Letters, Vol. 100, Issue 5; ISSN 0003-6951
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERIUM COMPOUNDS
ELECTRIC CONDUCTIVITY
HELIUM
IRON
IRON COMPOUNDS
MAGNETIC SUSCEPTIBILITY
PNICTIDES
PRESSURE DEPENDENCE
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SYNCHROTRONS
TRANSITION TEMPERATURE
VALENCE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS