In this paper we present our results on the low density magnetic flux pinning characteristics, obtained though HTSC samples magnetization relaxation measurements M(t) near the phase transition temperatures (0,8 < T/Tc > 0,99).As the main object of investigation we have chosen pure YBa2Cu3O7-x (YBCO) single crystal samples with optimal oxygen saturation. We note the presence of strong pinning in the system of unidirectional planar defects and a significant nonmonotonicity of the Up(T) dependence behavior for low density trapped magnetic flux.
@article{arxiv.1407.4304,
title = {Averaged effective pinning potential in YBCO single crystals close to Tc},
author = {V. Yu. Monarkha and A. G. Sivakov and V. P. Timofeev},
journal= {arXiv preprint arXiv:1407.4304},
year = {2015}
}