Alekseevskii N.; Mitin A.; Nizhankovskii V.; Garifullin I.; Garif'yanov N.; Khaliullin G.; Khylbov E.; Kochelaev B.; Tagirov L.
(1989)
Electron paramagnetic resonance (EPR) of Gd3+, Eu2+, and copper ions has been investigated in the high-Tc superconductor with YBa2Cu3O7-α structure. It has been established that the system is heterogeneous at 0.15≤δ≤0.5 ...