Vg. Prokhorov et al., Influence of magnetic impurities on the microwave resistance of overdoped YBa2Cu3O7-delta films - art. no. 024502, PHYS REV B, 6402(2), 2001, pp. 4502
The temperature dependence of the microwave surface resistance for overdope
d YBa2Cu3O7-delta films has been investigated experimentally. It was shown
that the observed unusual behavior of the surface resistance can be describ
ed in the framework of the spin-flip scattering of carriers, leading to the
pair breaking and the subsequent recovery of superconductivity caused by t
he ordering trend of the magnetic impurities at low temperature. A simple p
henomenological model based on the common BCS approach is suggested, which
is able to interpret nicely the experimental data.