Journal
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume 471, Issue 5-6, Pages 213-215Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2011.01.002
Keywords
FeAs-based superconductor; Non-magnetic impurity; Doping effect; Pair-breaking
Categories
Funding
- MEXT, Japan
- JSPS [20360012, 22246083]
- Grants-in-Aid for Scientific Research [20360012, 22246083] Funding Source: KAKEN
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We report properties of the Zn-substituted polycrystalline superconductors BaFe1.87-xZnxCo0.13As2 (x = 0, 0.04, 0.06 and 0.08) prepared at ambient pressure condition. Electrical conductivity and magnetization measurements revealed that the superconductivity is suppressed by at most 2% substitution of Zn, which shows typical behavior of an anisotropically gaped superconductivity rather than an isotropically gaped superconductivity. With increasing the amount of Zn, weak change in superconductivity was observed. It is likely impossible to obtain BaFe1.87-xZnxCo0.13As2 crystals with x > 0.04 at ambient pressure condition. On the basis of the structural and the physical properties of the present system, we discuss a possible mechanism of the superconducting pairing. (C) 2011 Elsevie r B.V. All rights reserved.
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