Aa. Gallitto et al., MICROWAVE MAGNETIC-FIELD EFFECTS IN YBA2CU3O7 SINGLE-CRYSTALS NEAR T-C, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 16(10-11), 1994, pp. 1889-1894
The non-linear response near T-c and the complex electromagnetic condu
ctivity of YBa2Cu3O7 Single crystals at microwave frequencies are expl
ained in the framework of the two-fluid model with the additional hypo
thesis that the e.m. field modulates the partial concentrations of bot
h normal and superconducting, fluids.