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ST143 - Thin Film Nanocomposites Based on YBCO with Defects Comprised of Self-assembled Inclusions

Thin Film Nanocomposites Based on YBCO with Defects Comprised of Self-assembled Inclusions

O. V. Boytsova1, A. R. Kaul1, S. V. Samoilenkov2, I. E. Voloshin3

1Department of Material Science, Chemistry Department,
Moscow State University, 119992, Moscow, Russia
2Institute of High Temperature RAS, Izhorskaja 13/19, 125412, Moscow, Russia
3All-Russian Electrical Enginering Inst – Moscow, Russuia

E-mail: [email protected]

ABSTRACT - The critical current of YBCO superconducting coatings in external magnetic field can be enhanced by incorporating high density of extended nanometer-sized defects to act as pinning centers for magnetic vortices. One particular variant involves the deposition superconducting film with columnar defects comprised of self-assembled BaZrO3, BaSnO3 or BaHfO3 nanoinclusions. Here we report the results of our study of YBCO films with different inclusions prepared by MOCVD. For the first time, we succeeded in growth of YBCO films with oriented nanoinclusions of BaCeO3 phase and demonstrate that it does not reduce Tc of YBCO, in contrast to BaZrO3 or BaSnO3. The best composite thin films revealed the Tc value of about 88K and critical current density at 77K above 1MA/cm2 in self-field and around 0.3 MA/cm2 in 1 T (B//c).

IEEE/CSC & ESAS EUROPEAN SUPERCONDUCTIVITY NEWS FORUM (ESNF), No. 11, January 2010
Published in Journal of Physics Conf. Series (SuST234, 012008 (2010)