Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation

@inproceedings{Kim2012MagneticPM,
  title={Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation},
  author={Jeehoon Kim and Nestor Haberkorn and M. J. Graf and I. Usov and Filip Ronning and Leonardo Civale and Evgeny Nazaretski and G. F. Chen and Weiqiang Yu and Jeff D. Thompson and Roman Movshovich},
  year={2012}
}
  • Jeehoon Kim, Nestor Haberkorn, +8 authors Roman Movshovich
  • Published 2012
  • Physics
  • We report on the dramatic effect of random point defects, produced by proton irradiation, on the superfluid density $\rho_{s}$ in superconducting Ca$_{0.5}$Na$_{0.5}$Fe$_2$As$_2$ single crystals. The magnitude of the suppression is inferred from measurements of the temperature-dependent magnetic penetration depth $\lambda(T)$ using magnetic force microscopy. Our findings indicate that a radiation dose of 2$\times10^{16}$cm$^{-2}$ produced by 3 MeV protons results in a reduction of the… CONTINUE READING

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