Abstract
In combination with oxygen depletion, the different decrease behaviours of superconductivity in Fe, Ni and Zn doped YBa
2Cu
3O
7-
δ
compounds have been investigated in this report. The oxygen depletion induced superconductivity decrease rates are very close in the YBa
2Cu
2.9Fe
0.1O
7-
δ
, YBa
2Cu
2.9Ni
0.1O
7-
δ
and YBa
2Cu
3O
7-
δ
compounds, but this parameter is doubled in the YBa
2Cu
2.9Zn
0.1O
7-
δ
sample. This implies that 3d transition metals not only suppress superconductivity in YBa
2Cu
3O
7-
δ
as a magnetic impurity centre but also reduce the mobility of the mobile holes. The different decrease rates observed in Fe, Ni and Zn doped compounds suggest that the destruction of complete CuO
2 plane long-range magnetic ordering is rather crucial for the superconductivity.