The effects of anneal time and cooling rate on the formation and texture of Bi sub 2 Sr sub 2 CaCu sub 2 O sub 8 films

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5878367

Matthiesen, M M; Graybeal, J M; Orlando, T P; Vander Sande, J B ^[1]; Rudman, D A ^[2]

---

1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Center for Materials Science and Engineering
2. Cryoelectronic Metrology Group, N.I.S.T., Boulder, CO (US)

This paper reports on the effects of anneal time and cooling rate on the formation and texturing of superconducting Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (BCCCO) films. Samples were prepared by sputter depositing amorphous BSCCO films, annealing them at 870{degrees} C in flowing 20% O{sub 2}-80% Ar for 30, 60 or 180 minutes and then cooling them. Two cooling rates were investigated: a fast cool of 80{degrees} C/min and a slow cool of 9{degrees} C/min. It was observed that effective coupling between superconducting 2212 grains occurs when films exhibit a minimum amount of (001) texturing. In addition, the nucleation and growth kinetics are significantly different for the isothermal and cooling regimes of thermal processing. Consequently, anneal time and cooling rate play distinct roles in the achievement of the appropriate texture and microstructure in the films; longer anneal times increase the volume fraction of the 2212 phase while slower cooling rates enhance grain growth and texturing.

• OSTI ID: 5878367
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• 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
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
ARGON
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COOLING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELEMENTS
FILMS
FLUIDS
GASES
GRAIN GROWTH
HEAT TREATMENTS
MICROSTRUCTURE
NONMETALS
NUCLEATION
OXIDES
OXYGEN COMPOUNDS
RARE GASES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
TEXTURE
TRANSITION ELEMENT COMPOUNDS