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Дата изменения: Sat May 22 20:22:32 2004 Дата индексирования: Tue Oct 2 02:38:38 2012 Кодировка: |
Percolation theory is used for a comparative analysis of curves
of the superconducting transition in ceramic
YBa2Cu3O7 - in a zero
magnetic field found through measurements of the resistance,
R(T), and the dynamic susceptibility,
(T). When there is
an oxygen deficiency (
> 0), the
grains have a wide distribution with respect to the superconducting
transition temperature Tc.
PACS: 74.70.Vy, 74.60.Mj