The influence of Pb-ion irradiation on melt-textured YBa2Cu3Ox crystals

摘要

Melt-textured YBa2Cu3Ox crystals have been irradiated along the c-axis with Pb-208(56+) ions corresponding to dose matching fields, B-Phi = 0.5 T and B-Phi = 2.0 T. Magnetization measurements were conducted along the ab plane of the samples. The strength of pinning sites was investigated by measuring magnetization hysterisis and the saturation remanent magnetization M-R at several temperatures. We have found that the pinning strength was considerably enhanced after irradiation at both doses. Interestingly, the pinning strength at a Pb-ion irradiation which corresponds to the dose matching field B-Phi = 0.5 T, was found to be significantly larger than that at the dose matching field B-Phi = 2.0 T at all temperatures. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim