Electron irradiation of Co, Ni, and P-doped BaFe2As 2-type iron-based superconductors

Cornelis Jacominus Van Der Beek, Sultan Demirdiş, Dorothée Colson, Florence Rullier-Albenque, Yanina Fasano, Takasada Shibauchi, Yuji Matsuda, Shigeru Kasahara, Piotr Gierlowski, Marcin Konczykowski

Research output: Contribution to journalConference articlepeer-review

23 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number012023
JournalJournal of Physics: Conference Series
Volume449
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event10th International Conference on Materials and Mechanisms of Superconductivity, M2S 2012 - Washington, DC, United States
Duration: Jul 29 2012Aug 3 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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