Abstract:
We performed a systematic study of the superconducting transition temperature(
Tc), critical current density(
Jc), irreversibility field(
Hirr), upper critical field(
Hc2), activation energy(
U0) and flux pinning mechanism in Y(Dy
0.5) Ba
2Cu
3O
7-δ coated conductors. Our results show that the broadening of the resistivity transition is significantly different when
H//c and
H//ab, indicating that resistivity has a strong magnetic field-induced inter-plane anisotropy. Based on the thermally activated flux flow(TAFF) model, the flux pinning of
H//ab is stronger than that of
H//c. In the case of H//ab and
H//c, α is 0.5 and 0.57 that indicate the surface pinning is responsible for the main pinning mechanism in Y(Dy
0.5) Ba
2Cu
3O
7-δ coated conductors.