GROWTH OF NEAR-FREE-STANDING YBA2CU3O7-TYPE CRYSTALS USING A SELF-DECANTING FLUX METHOD
|Title||GROWTH OF NEAR-FREE-STANDING YBA2CU3O7-TYPE CRYSTALS USING A SELF-DECANTING FLUX METHOD|
|Publication Type||Journal Article|
|Year of Publication||1992|
|Authors||Vanderah, T. A., Lowema C. K., Bliss D. E., Decker M. W., Osofsky M. S., Skelton E. F., and Miller M. M.|
|Journal||Journal of Crystal Growth|
Near-free-standing platelets of YBa2Cu3Ox with 1-4 mm edges have been reproducibly obtained using a self-decanting BaO:CuO flux method. The overall stoichiometry of the growth mixture was Y:Ba:Cu = 1.0:18.4:45.1. The flux was induced to decant by a thermal gradient. After oxygen-annealing, crystals displayed sharp T(c)-values near 92 K. Crystals of ten of the RBa2Cu3Ox congeners (R = Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb) and the "n-type" superconductor Nd1.85Ce0.15CuO4 were also grown using the method described. The results of an oxygen-annealing study of YBa2Cu3Ox crystals wherein transition temperature, transition width, apparent oxygen content, and annealing history were correlated, are also reported.