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Information × Registration Number 0211U006257, 0109U005869 , R & D reports Title High-Tc superconducting REBCO cuprates single crystals and thin films: growth technology, fundamentals of high-Tc superconductivity, and electromagnetic properties. popup.stage_title Head Pan Volodymyr Myhaylovych, Registration Date 03-03-2011 Organization Institute for metal physics NAS Ukkraine popup.description2 The experimental samples of single-crystal HTS cuprate YBa2Cu3O7-х thin films for microwave experiments were prepared by pulse laser deposition method. Main problems emerging during the growing process of large size HTS single-crystals and the ways of their solution are considered. Temperature and magnetic-field dependences of microwave response in HTS YBCO thin films deposited on LaAlO3 and Al2O3 monocrystalline substrates are studied experimentally. The magnetic-field dependences of the complex flux flow resistivity are obtained for both parallel and perpendicular orientations of applied magnetic field with respect to to the film's surface. The values of meaningful parameters such as : pinning constant, kp, viscosity coef-ficient, n, and depinning frequency, wp, are obtained in these experiments. It is shown, that these parameters do not depend on magnetic field value in the range 0.2 T - 1 T. We have also determined the kp, n, wp anisotropy for different magnetic-field orientations with respect to the crystallographic c axis of the film. The obtained results can be well described by the model of strong individual vortex pinning. Obtained pecularities of the pinning-constant anisotropy point on the high concentration of extended linear defects (dislocations) aligned along the c axis. Product Description popup.authors Каленюк Олексій Андрійович Касаткін Олександр Леонідович Фліс Віктор Семенович popup.nrat_date 2020-04-02 Close