Crystal growth by the TSFZ method and superconducting properties of the tetragonal 1-2-3 type cuprates

Authors
Noji, T Akagawa, H Oikawa, T Ono, Y Koike, Y
Citation
T. Noji et al., Crystal growth by the TSFZ method and superconducting properties of the tetragonal 1-2-3 type cuprates, J L TEMP PH, 117(3-4), 1999, pp. 705-709
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF LOW TEMPERATURE PHYSICS
ISSN journal
00222291 → ACNP
Volume
117
Issue
3-4
Year of publication
1999
Pages
705 - 709
Database
ISI
SICI code
0022-2291(199911)117:3-4<705:CGBTTM>2.0.ZU;2-3
Abstract
Single crystals of Ca0.5La1.25Ba1.25Cu3Oy and NdBaSrCu3Oy with the dimensio ns of the order of 1x1x0.5 mm(3) have been grown by the travelling-solvent floating zone method. As-grown single-crystals are tetragonal and non-super conducting. Through the annealing in oxygen, single crystals of Ca0.5La1.25 Ba1.25Cu3Oy have become superconductors with T-c = 55 - 65 K, keeping the t etragonal structure. On the other hand, single crystals of NdBaSrCu3Oy have changed from tetragonal to orthorhombic through the annealing in oxygen, t hough they have become superconductors with T-c = 55 K.