7. Superconductivity - University of Liverpool

Characteristics
The first of the high temperature superconductors discovered is
YBCO (Yttrium-Barium-Copper-Oxide),
Being copper oxides, these materials are very poor conductors
of electricity at room temperature.
When they do become superconducting at liquid nitrogen
temperatures, there are fewer Cooper pairs compared to
metallic superconductors.
As a result, they are strongly type II when superconducting -
flux lines can penetrate.
Superconductivity 71