M. A. Vasjutin, N. D. Kuzmichev, V. V. Slavkin
Mordovia State University, Ruzaevka, Russia
A. I. Golovashkin, I. S. Levchenko
P. N. Lebedev Institute of Physics, RAS, Moscow, Russia
With modulation method it was measured magnetization and voltage garmonics amplitudes of polycrystal YBa2Cu3O7-d samples. It was experimentally found that two systems of weak links existed, intergraniilar and intragranular. This leads to more complicated form of the I-V curve.
