K. Barner et al., THE POSSIBILITY OF A SPIN AND FLUX-LINE GLASSY STATE IN HIGH T(C) SUPERCONDUCTORS, Solid state communications, 89(7), 1994, pp. 645-646
Hysteresis, remanence and positive magnetization in the magnetization
curves of Mn-substituted LaBa2Cu3O7-delta high T(c) superconductors ar
e connected with a combined Abrikosov- and spin-glass state.