(1) Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005 Bombay, India
Abstract:
Our results of microscopic and macroscopic studies of novel highTc superconductors are discussed. They permit a straightforward comparison of the nature of the superconductivity in 40 K range (La2CuO4 type) and 90 K range (YBa2Cu3O7 type) superconductors.