Volume 87, Number 1, July 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||23 July 2009|
Pressure-induced superconductivity in BaFe2As2 single crystal
Materials Science Group, Indira Gandhi Centre for Atomic Research - Kalpakkam, 603102, Tamilnadu, India
Corresponding author: firstname.lastname@example.org
Accepted: 24 June 2009
The evolution of pressure-induced superconductivity in single crystal as well as polycrystalline samples of BaFe2As2 have been investigated through temperature-dependent electrical resistivity studies in the 0–7 GPa pressure range. While the superconducting transition remains incomplete in the polycrystalline sample, a clear pressure-induced superconductivity with zero resistivity at the expense of magnetic transition, associated with spin density wave (SDW), is observed in the single-crystal sample. The superconducting transition temperature is seen to increase upto a moderate pressure of about ~ 1.5 GPa and decreases monotonically beyond this pressure. The SDW transition temperature decreases rapidly with increasing pressure and vanishes above ~ 1.5 GPa.
PACS: 74.62.Fj – Pressure effects / 74.70.Dd – Ternary, quaternary, and multinary compounds (including Chevrel phases, borocarbides, etc.) / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
© EPLA, 2009
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