Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 22, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/22/7/072204
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Funding
- CNAM
- AFOSR-MURI [FA9550-09-1-0603]
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We report superconductivity in single crystals of the new iron-pnictide system BaFe1.90Pt0.10As2 grown by a self-flux solution method and characterized via x-ray, transport, magnetic and thermodynamic measurements. The magnetic ordering associated with a structural transition at 139 K present in BaFe2As2 is completely suppressed by substitution of 5% Fe with Pt and superconductivity is induced at a critical temperature T-c = 23 K. Full diamagnetic screening in the magnetic susceptibility and a jump in the specific heat at T-c confirm the bulk nature of the superconducting phase. All properties of the superconducting state-including the transition temperature Tc, the lower critical field H-c1 = 200 mT, the upper critical field H-c2 approximate to 65 T, and the slope partial derivative H-c2/partial derivative T-are comparable in value to those found in other transition metal-substituted BaFe2As2 series, indicating the robust nature of superconductivity induced by substitution of Group VIII elements.
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