Crystallite alignment of YBa2Cu3O7-xthrough texture growth
- 1 October 1989
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 2 (4), 212-215
- https://doi.org/10.1088/0953-2048/2/4/002
Abstract
Critical current densities of superconducting YBa2Cu3O7-x can be increased by several orders of magnitude by sintering processes that encourage textured growth of microcrystals from the melt. Alignment parallel to the a-b planes maximises the conduction within grains, reduces grain boundary resistivity, facilitates oxygen diffusion through vacancies in the a-b planes, and eliminates microcracking resulting from anisotropic thermal expansion. Measured critical current densities in excess of 2400 A cm-2 at 77 K are limited not by the specimen but by ohmic contact resistance.Keywords
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