Fast neutron irradiation and flux pinning in single crystalline high temperature superconductors
1993; Elsevier BV; Volume: 33; Issue: 1 Linguagem: Inglês
10.1016/0011-2275(93)90068-y
ISSN1879-2235
AutoresF.M. Sauerzopf, Hans‐Peter Wiesinger, W. Kritscha, H.W. Weber, M.C. Frischherz, H. Gerstenberg,
Tópico(s)Advanced Condensed Matter Physics
ResumoWe report on the influence of fast neutron irradiation on the critical currents in single crystalline YBa2Cu3O7−δ and Bi2Sr2CaCu2O8+γ. From magnetization measurements and especially from an analysis of the irreversibility lines, models for the defect structure, effective for flux pinning in these systems, are derived. A comparison of fast neutron irradiation of YBa2Cu3O7−δ at 5 K (and subsequent measurement without warming the sample above 95 K) and at ambient reactor temperature allows us to distinguish qualitatively between the contributions of defects of different size to flux pinning in these systems.
Referência(s)