[ital In] [ital situ] growth of epitaxial Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8[minus][ital x]] and Bi[sub 2]Sr[sub 2]CuO[sub 6[minus][ital x]] films by pulsed laser ablation

Journal Article · Mon Jul 19 00:00:00 EDT 1993 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.110008· OSTI ID:6402485

Zhu, S ^[1]; Lowndes, D H; Chakoumakos, B C; Budai, J D; Christen, D K ^[2]; Zheng, X; Jones, E ^[1]; Warmack, B ^[3]

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1. Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996 (United States)
2. Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6056 (United States)
3. Health and Safety Research Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6123 (United States)

Pulsed-laser ablation has been used to grow epitaxial films of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8[minus][ital x]] (Bi-2212) and Bi[sub 2]Sr[sub 2]CuO[sub 6[minus][ital x]] (Bi-2201) on (001) MgO with entirely [ital in] [ital situ] processing. The films' layer-stacking sequence, microstructure, and superconducting [ital T][sub [ital c]] are highly sensitive to the growth temperature and deposition rate. Pure Bi-2212 films exist over only a narrow temperature range. Pure Bi-2201 films appear at higher growth temperature, while lower growth temperature enhances the Bi-2223 phase, though it is mixed with Bi-2212. The phase homogeneity, in-plane connections among grains, and superconducting [ital T][sub [ital c]] of Bi-2212 grown at a given temperature are greatly improved by reducing the deposition rate. Epitaxial Bi-2212 films grown at 740 [degree]C and 0.5 Hz ([similar to]0.05 nm/s) have [ital T][sub [ital c]0] ([ital R]=0)=71 K, with [ital J][sub [ital c]][similar to]8[times]10[sup 5] A/cm[sup 2] at 50 K and [ital J][sub [ital c]][similar to]5[times]10[sup 6] A/cm[sup 2] at 4.2 K.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6402485
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 63:3; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL GROWTH METHODS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
EPITAXY
FILMS
HIGH-TC SUPERCONDUCTORS
IN-SITU PROCESSING
LASER RADIATION
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROCESSING
RADIATIONS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE