Disorder and flux pinning in superconducting pnictide single crystals

Cornelis Jacominus van Der Beek (1) , Giancarlo Rizza (1) , Marcin Konczykowski (1) , Pierre Fertey (2) , Isabelle Monnet (3) , Ryuji Okazaki (4) , Terukazu Kato (4) , Kenishiro Hashimoto (4) , M. Shimozawa (4) , Hiroaki Shishido (4) , Minoru Yamashita (4) , Motoyuki Ishikado (5) , Hijiri Kito (6) , Akira Iyo (6) , Hiroshi Eisaki (6) , Shin-Ichi Shamoto (5) , Takasada Shibauchi (4) , Yuji Matsuda (4)

1 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
2 SSOLEIL - Synchrotron SOLEIL
3 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
4 Department of Physics, Kyoto University
5 QUBS - Quantum Beam Science Directorate
6 NeRI - Nanoelectronics Research Institute

Crystalline disorder in the pnictide superconductor PrFeAsO1−y is studied using magneto-optical visualisation of flux penetration, Transmission Electron Microscopy, and X-ray diffraction using synchrotron radiation. Critical-state like flux distributions and the magnitude and temperature dependence of the critical current demonstrate bulk vortex pinning by oxygen vacancies at all temperatures.

Mots clés: Pnictures; Pnictides; Iron pnictide superconductor; Ancrage de vortex; Flux pinning; Disorder; Désordre; Electron Microscopy; Microscopie Electronique

Domaines: Supraconductivité [cond-mat.supr-con]

Cornelis Jacominus van Der Beek, Giancarlo Rizza, Marcin Konczykowski, Pierre Fertey, Isabelle Monnet, et al.. Disorder and flux pinning in superconducting pnictide single crystals. 9th International Conference on Materials and Mechanisms of Superconductivity, Sep 2009, Tokyo, Japan. ⟨10.1016/j.physc.2009.11.089⟩. ⟨hal-00433744⟩