TY - JOUR
T1 - Enhancement of critical current density in fast neutron irradiated melt-textured YBa2Cu3O7-x
AU - Puźniak, R.
AU - Wiśniewski, A.
AU - Baran, M.
AU - Szymczak, H.
AU - Pingxiang, Zhang
AU - Jingrong, Wang
AU - Lian, Zhou
AU - Pytel, K.
AU - Pytel, B.
PY - 1993
Y1 - 1993
N2 - The critical current density in melt-textured samples obtained by the powder melting process was determined from magnetization measurements. Linear dependence between the width of the hysteresis loop and sample size was observed for both unirradiated and irradiated samples. This indicates that the critical current is circulating through the whole sample and is not disconnected by weak links, even when a magnetic field is applied in the irradiated sample. After fast neutron irradiation with fluences from 5 × 1016 to 6 × 1017 n cm-2 (E > 0.5 MeV), significant enhancement of the critical current density, jc, was observed. Critical current density, determined from magnetization measurements, for magnetic field perpendicular to the a-b plane, jcab, reaches - 105 A cm42 at 77 K in 1 T. For H parallel to the a-b plane, jcc along the c-axis reaches 5 × 103 A cm-2. An increase in the anisotropy of the critical current was observed after fast neutron irradiation in the temperature range 60 - 80 K.
AB - The critical current density in melt-textured samples obtained by the powder melting process was determined from magnetization measurements. Linear dependence between the width of the hysteresis loop and sample size was observed for both unirradiated and irradiated samples. This indicates that the critical current is circulating through the whole sample and is not disconnected by weak links, even when a magnetic field is applied in the irradiated sample. After fast neutron irradiation with fluences from 5 × 1016 to 6 × 1017 n cm-2 (E > 0.5 MeV), significant enhancement of the critical current density, jc, was observed. Critical current density, determined from magnetization measurements, for magnetic field perpendicular to the a-b plane, jcab, reaches - 105 A cm42 at 77 K in 1 T. For H parallel to the a-b plane, jcc along the c-axis reaches 5 × 103 A cm-2. An increase in the anisotropy of the critical current was observed after fast neutron irradiation in the temperature range 60 - 80 K.
KW - critical current density
KW - neutron irradiation
KW - YBaCuO
UR - http://www.scopus.com/inward/record.url?scp=0027562499&partnerID=8YFLogxK
U2 - 10.1016/0011-2275(93)90042-M
DO - 10.1016/0011-2275(93)90042-M
M3 - 文章
AN - SCOPUS:0027562499
SN - 0011-2275
VL - 33
SP - 261
EP - 265
JO - Cryogenics
JF - Cryogenics
IS - 3
ER -