Title :
Flux Dynamic Changes by Neutron Irradiation in BISCCO: High Harmonics AC Susceptibility Analysis
Author :
Di Gioacchino, Daniele ; Tripodi, Paolo ; Vinko, Jenny Darja ; Mihalache, Valentina ; Popa, Stelian
Author_Institution :
Nat. Inst. of Nucl. Phys.-Nat. Lab. of Frascati, Frascati
fDate :
6/1/2007 12:00:00 AM
Abstract :
High harmonics ac susceptibility measurements joint with neutron irradiations on quasi-bi-dimensional high temperature superconductor (quasi-2D-HTSC) are good tools to study the flux dynamics and its interaction with pinning processes in these superconductors. Flux neutron intensity of shows a deep change in the flux pinning dynamics in Bi-Sr-Ca-Cu-O (BSCCO) system. Third harmonic susceptibility signal increases in amplitude after the neutron irradiation, followed by a rise of the pinning and critical current. Moreover, after the irradiation, the measurements underline the demise of the anomalous peak effect (PE) associated with a three-dimensional/two-dimensional (3D/2D) flux lattice transition.
Keywords :
bismuth compounds; calcium compounds; flux pinning; high-temperature superconductors; magnetic susceptibility; neutron effects; strontium compounds; Bi1.8Pb0.4Sr1.8Ba0.2Ca2Cu3Ox; flux dynamic changes; flux neutron intensity; high harmonics ac susceptibility; neutron irradiation; third harmonic susceptibility; three-dimensional/two-dimensional flux lattice transition; Copper; Critical current; Flux pinning; Harmonic analysis; High temperature superconductors; Magnetic field measurement; Neutrons; Strontium; Superconducting materials; Temperature measurement; BiSCCO; flux pinning regimes; high harmonic magnetic ac susceptibility measurements; neutron irradiation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898227
