Structure and properties of BSCCO-whiskers grown from amorphous precursors with foreign dopants

Application of elevated magnetic fields during growth of BiSrCaCuO superconducting whiskers and studies of growth defects for better understanding of the growth mechanism

“…cation vapor environment ensures local equilibrium with liquid phase and prevention of cation evaporation and escape from the growth site. For the first case of active role, the driving force would be super-saturation of the liquid due to the continuous arrival of cation vapors at the growth site and for the situation of the passive role, the driving force of the self-growth of whiskers should be thermal gradients [21,22] or capillarity forces of the liquid [18] generating the necessary chemical gradient. On the other hand, analysis of the profile of the kinetics curves of growth are closer to the VLS model [7].…”

X-ray crystal structures of Al-doped (Y,Ca)Ba2Cu3O7−ywhiskers

“…Concerning the Al addition, this element was either incorporated from alumina crucibles used during the synthesis of single crystals or added in the form of Al 2 O 3 nanoparticles, showing a substantial effect on the structure and superconducting transition temperature in both cases (Antal et al, 2010;Badica et al, 2006;Oskina et al, 1996). For instance, Xray diffraction experiments on single crystals have shown that Al prefers an octahedral oxygen coordination, which is possible only in the Cu-O chains along the b-axis inducing a tetragonal P4/mmm crystal structure (Siegrist et al, 1987).…”

Al doping influence on crystal growth, structure and superconducting properties of Y(Ca)Ba2Cu3O7−y whiskers

“…As a matter of fact, much information is given in the literature about BSCCO whiskers and what is favoring or allowing their growth [11]. In this case, alumina addition as a precursor dopant has been found to drastically enhance the formation of such whiskers [12][13][14][15].…”