J. Phys. I France
Volume 7, Numéro 12, December 1997
Page(s) 1665 - 1675
DOI: 10.1051/jp1:1997161
J. Phys. I France 7 (1997) 1665-1675

Systematic Study of the (ET) $\mathsf{_2}$I $\mathsf{_3}$ Reticulate Doped Polycarbonate Film: Structure, ESR, Transport Properties and Superconductivity

E. Laukhina1, J. Ulanski2, A. Khomenko1, S. Pesotskii1, V. Tkachev1, L. Atovmyan1, E. Yagubskii1, C. Rovira3, J. Veciana3, J. Vidal-Gancedo3 and V. Laukhin1, 3

1  Institute of Chemical Physics, Russian Academy of Sciences, Chernogolovka, MD 142432, Russia
2  Polymer Institute, Technical University of Lodz, 90-924, Poland
3  Institut de Ciència de Materials (CSIC), Campus de la UAB, 08193 Bellaterra, Spain

(Received 16 April 1997, revised 25 July 1997, accepted 19 August 1997)

The crystalline network structure of conducting (ET) 2I 3 reticulate doped polycarbonate (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) 2I 3 crystalline network is formed. The c-axis of the linked $\alpha$-(ET) 2I 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 $\alpha - \rightarrow\beta_{\rm t}-$(ET) 2I 3 transition which takes place under film annealing. Thus, the conducting layers of the linked superconducting $\beta_{\rm t}-$(ET) 2I 3 crystals are also parallel to the film surface. It was demonstrated that superconducting properties are present in all parts of the $\beta_{\rm t}-$(ET) 2I 3 RDP film.

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