2013年
Electron irradiation of Co, Ni, and P-doped BaFe2As 2-type iron-based superconductors
Journal of Physics: Conference Series
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- 巻
- 449
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- DOI
- 10.1088/1742-6596/449/1/012023
- 出版者・発行元
- Institute of Physics Publishing
High energy electron irradiation is used to controllably introduce atomic-scale point defects into single crystalline Ba(Fe1-xCox)2As2, Ba(Fe1-xNix)2As2, and BaFe2(As1-xPx)2. The appearance of the collective pinning contribution to the critical current density in BaFe2(As1-xPx)2, and the magnitude of its enhancement in Ba(Fe1-xCox)2As2, conform with the hypothesis of quasi-particle scattering by Fe vacancies created by the irradiation. Whereas the insignificant modification of the temperature dependence of the superfluid density in Ba(Fe1-xCox)2As2 and Ba(Fe1-xNix)2As2 points to important native disorder present before the irradiation, the critical temperatures of these materials undergo a suppression equivalent to that observed in the much cleaner BaFe2(As1-xPx)2. This lends credence to the hypothesis of line nodes of the order parameter (at finite kz) in the former two materials. © Published under licence by IOP Publishing Ltd.
- ID情報
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- DOI : 10.1088/1742-6596/449/1/012023
- ISSN : 1742-6596
- ISSN : 1742-6588
- SCOPUS ID : 84883039215