Growth and characterization of single-crystal Y<sub>1-x</sub>Gd<sub>x</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>6+y</sub>
H L Ji; C G Zhang; X Jin; J B Ji; X N Xu; R X Lu; X X Yao; G D Sheng; H L Ji; Dept. of Phys., Nanjing Univ., China; C G Zhang; Dept. of Phys., Nanjing Univ., China; X Jin; Dept. of Phys., Nanjing Univ., China; J B Ji; Dept. of Phys., Nanjing Univ., China; X N Xu; Dept. of Phys., Nanjing Univ., China; R X Lu; Dept. of Phys., Nanjing Univ., China; X X Yao; Dept. of Phys., Nanjing Univ., China; G D Sheng; Dept. of Phys., Nanjing Univ., China
Журнал:
Superconductor Science and Technology
Дата:
1992-11-01
Аннотация:
Single crystals of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+y</sub>, Y<sub>0.5</sub>Gd<sub>0.5</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>6+y</sub> and GdBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+y</sub> have been prepared by the self-flux method, and their growing conditions have been optimized through several trial runs. A post-annealing of as-grown single crystals in high-pressure ( approximately 150 bar) pure oxygen proves to be very effective in increasing their T<sub>c</sub> over 90 K. Laue back diffraction patterns confirmed the good quality of the samples. The morphology, composition analysis and the magnetic properties of these crystals are also reported.
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