Crystal growth and properties of the RBa sub 2 Cu sub 3 O sub 7 minus y family

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Superconductivity; (USA)

OSTI ID:6862078

Voronkova, V I; Vodolazskaya, I V; Yanovskii, V K ^[1]

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1. M. V. Lomonosov Moscow State University, Moscow (SU)

The RBa{sub 2}Cu{sub 2}O{sub 7{minus}y} single crystals (R=Y, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Yb) with dimensions from 1--2 mm to 7--8 mm were grown from nonstoichiometric melts of R{sub 2}O{sub 3}-BaO-CuO systems. The growth mechanism seems to be a dislocation mechahism in which the substance is transported along a thin cuprate melt film which west the faces of the growing crystal. The domain structure depends on the growth conditions. In some cases nearly single-domain crystals of YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} and TmBa{sub 2}Cu{sub 3}O{sub 7{minus}y} several millimeters in size can be obtained. Magnetic measurements were used to detect superconducting transitions. After annealing in oxygen the critical temperature increased to temperatures in the range 62--89 K for various metals.

• OSTI ID: 6862078
• Journal Information: Superconductivity; (USA), Journal Name: Superconductivity; (USA) Vol. 2:2; ISSN SUPRE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL GROWTH
CRYSTAL STRUCTURE
CRYSTALS
DOMAIN STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE