Title :
Pinning property of Bi-2212 single crystals with columnar defects
Author :
Otabe, Edmund S. ; Okamura, Kazunori ; Wada, Hiroshi ; Kiuchi, Masaru ; Yasuda, Takashi ; Okayasu, Satoru ; Matsushita, Teruo
Author_Institution :
Fac. of Comput. Sci. & Syst. Eng., Kyushu Inst. of Technol., Iizuka, Japan
fDate :
6/1/2003 12:00:00 AM
Abstract :
The critical current density and the irreversibility field were measured before and after nickel ion irradiation for Bi-2212 single crystals in an optimally doped or an overdoped state in a magnetic field parallel to the direction of irradiation. The critical current density was theoretically calculated by using the summation theory and the flux creep-flow model. From the comparison with experimental results the condensation energy density was estimated for each specimen. These results are compared with a similar analysis on three-dimensional Y-123.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); flux creep; flux pinning; high-temperature superconductors; strontium compounds; Bi-2212 single crystals; Bi2Sr2CaCu2O8; columnar defects; condensation energy density; critical current density; flux creep-flow model; high temperature superconductor; irreversibility field; overdoped state; pinning property; summation theory; Critical current density; Crystals; Current measurement; Density measurement; Magnetic field measurement; Magnetic hysteresis; Magnetization; Nickel; Superconductivity; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812109
