The crystal growth of Y-Ba-Cu-O by laser floating zone melting

1 August 1988

journal article
Published by IOP Publishing in Superconductor Science and Technology

Vol. 1 (2) , 102-106
https://doi.org/10.1088/0953-2048/1/2/012

Abstract

The crystal growth of Y-Ba-Cu-O is explored by means of laser-heated pedestal growth (LHPG), which is a new crucible-free floating zone technology for growing oxide crystals from the melt. The result shows that the superconducting phase of YBa₂Cu₃O_7-x melts incongruently, and is separated into two phases of (Y₂BaCuO₅ and BaCuO₂) because of a peritectic reaction at 1010 degrees C during solidification. However, an oriented crystal in which the two phases coexist can be obtained by controlling the growth rate, and then may be transformed into superconductor with T_c above 90 K; such a crystal presents certain textural features following suitable heat treatment. The crystal structure and orientation after solidification and heat treatment are studied with the help of X-rays on electron microprobe and on optical microscope.

Keywords

This publication has 5 references indexed in Scilit:

Direct observation of electronic anisotropy in single-crystal $Y_{1}$ ${Ba}_{2}$ ${Cu}_{3}$ $O_{7 - x}$
Physical Review Letters, 1987
Phase diagram and superconductivity in the Y-Ba-Cu-O system
Applied Physics Letters, 1987
Bulk superconductivity at 91 K in single-phase oxygen-deficient perovskite ${Ba}_{2}$ ${YCu}_{3}$ $O_{9 - δ}$
Physical Review Letters, 1987
Growth of tetragonal BaTiO₃ single crystal fibers
Journal of Materials Research, 1986
Oxide crystal growth using gas lasers
Journal of Materials Science, 1970