Title :
A new growth technique of Ca-free Y1Ba2Cu3Ox single-crystal whiskers using antimony-doped precursors
Author :
Nagao, M. ; Yun, K.S. ; Wang, H.B. ; Inomata, K. ; Kim, S. ; Takano, Y. ; Hatano, T. ; Yamashita, T. ; Tachiki, M. ; Maeda, H. ; Sato, M.
Author_Institution :
Nat. Inst. for Mater. Sci., Ibaraki, Japan
fDate :
6/1/2005 12:00:00 AM
Abstract :
Single-crystal whiskers of Y1Ba2Cu3Ox with a length of about 4 mm were grown from an Sb-doped precursor. The optimum nominal composition of precursors in this Sb-doping method is Y2Ba2.75Cu3Sb0.5Ox. Sb is not detected in the whiskers by energy-dispersive x-ray spectroscopy (EDS). The standard 4-probe transport measurements for the as-grown whiskers show a critical temperature TC of about 90 K and a c-axis critical current density JC of 9.51×104 A/cm2 at 89 K.
Keywords :
X-ray chemical analysis; antimony; barium compounds; critical current density (superconductivity); crystal growth; high-temperature superconductors; superconducting transition temperature; whiskers (crystal); yttrium compounds; 4 mm; 4-probe transport measurements; 89 K; Sb-doped precursor; YBa2Cu3Ox; critical current density; critical temperature; doping method; energy-dispersive X-ray spectroscopy; growth technique; single-crystal whiskers; Critical current density; Crystallization; Current measurement; Density measurement; Josephson effect; Measurement standards; Plasma temperature; Spectroscopy; X-ray detection; X-ray detectors; Ca-free; Sb-doped precursor; single-crystal; whisker;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848768
