@article{33887, keywords = {superconducting films, magnetoresistance, Perovskite, Manganese, High temperature superconductors, Magnetic properties, Electric conductivity of solids, Magnetic variables measurement, Direct current resistivity, Surface resistances}, author = {S.E Lofland and M Dominguez and S.D Tyagi and S.M Bhagat and M.C Robson and C Kwon and Z Trajanovic and I Takeuchi and Ramamoorthy Ramesh and T Venkatesan}, title = {Surface resistance of thin Perovskite films - High-temperature superconductors and giant magnetoresistance manganites}, abstract = {We present a systematic study of the surface resistance of perovskite thin films and bulk samples at microwave frequencies. The d.c. resistivity p of the various samples spans three orders of magnitude. For bulk samples, we obtain the usual ρ1/2 dependence of Rs. For ρ < 1 μΩ cm, Rs displays conventional behavior, i.e. Rs α ρ. However, for ρ > 1 μΩ cm, Rs is not proportional to ρ but to the conductivity σ. Using this fact, we have made the first direct observation of a peak in σ1, just below Tc in a-axis films of YBa2Cu3O7.}, year = {1996}, journal = {Thin Solid Films}, volume = {288}, number = {1-2}, pages = {256-261}, issn = {00406090}, note = {cited By 28}, language = {eng}, }