| Issue |
EPL
Volume 87, Number 1, July 2009
|
|
|---|---|---|
| Article Number | 17004 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/87/17004 | |
| 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: mani@igcar.gov.in
Received:
25
March
2009
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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