Systematic study of the (ET)2I3 reticulate doped polycarbonate film:: Structure, ESR, transport properties and superconductivity

The crystalline network structure of conducting (ET)(2)I-3 reticulate doped polycarbonate carbonate (RDP) films were analysed by X-ray as well as ESR, transport properties and superconducting characteristics of the films were investigated. It was found that under certain conditions of the second step of the RDP-film preparation, an oriented alpha-(ET)(2)I-3 crystalline network is formed. The c-axis of the linked alpha-(ET)(2)I-3 crystallites are perpendicular to the film surface and consequently their conducting layers are parallel to this surface. Moreover, this type of crystalline network orientation is kept during the alpha--->beta(t)-(ET)(2)I-3 transition which takes place under film annealing. Thus, the conducting layers of the linked superconducting beta(t)-(ET)(2)I-3 crystals are also parallel to the film surface. It was demonstrated that superconducting properties are present in all parts of the beta(t)-(ET)(2)I-3 RDP film.