Neutron-irradiation effects in polycrystalline LaFeAsO0.9F0.1 superconductors
Abstract
The effect of atomic disordering induced by fast neutron irradiation on normal and superconducting state properties of polycrystalline LaFeAsO0.9F0.1 samples was investigated. Fast neutron (E>0.1MeV) irradiation to a “moderate” fluence Φ=1.6×1019cm-2 at Tirr=50±10°C leads to a complete suppression of superconductivity which recovers almost completely after annealing at Tann≤750°C . It is shown that decrease of Tc under disordering is determined mainly by reduction in electronic relaxation time τ . Such behavior is qualitatively described by the universal Abrikosov-Gor’kov equation, which testifies to an anomalous type of electron pairing in Fe-based superconductors.
- Publication:
-
Physical Review B
- Pub Date:
- November 2009
- DOI:
- 10.1103/PhysRevB.80.174512
- arXiv:
- arXiv:0904.1634
- Bibcode:
- 2009PhRvB..80q4512K
- Keywords:
-
- 74.62.Dh;
- 72.15.Gd;
- Effects of crystal defects doping and substitution;
- Galvanomagnetic and other magnetotransport effects;
- Condensed Matter - Superconductivity;
- Condensed Matter - Other Condensed Matter
- E-Print:
- 8 pages, 11 figures