Electromagnetic and microstructural investigations of a naturally grown 8{degree} [001] tilt bicrystal of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital x}}

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1996.0108· OSTI ID:283352

Wang, J; Tsu, I ^[1]; Cai, X Y ^[2]; Kelley, R J ^[3]; Vaudin, M D ^[4]; Babcock, S E ^[5]; Larbalestier, D C ^[6]

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1. Applied Superconductivity Center, Materials Science Program, Madison, Wisconsin 53706 (United States)
2. Applied Superconductivity Center, University of Wisconsin, Madison, Wisconsin 5306 (United States)
3. Applied Superconductivity Center, Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
4. Ceramics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
5. Applied Superconductivity Center, Department of Materials Science and Engineering, Materials Science Program, Madison , Wisconsin 53706 (United States)
6. Applied Superconductivity Center, Department of Materials and Engineering, Materials Science Program and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

Electromagnetic characterization and high resolution transmission electron microscopy have been conducted on the same 8{degree} [001] symmetrical (010) tilt boundary in a naturally grown, bulk-scale bicrystal of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital x}} (BSCCO-2212). The resistive transition showed excess resistance above and below {ital T}{sub {ital c}}, suggesting some weak coupling at the boundary, but the inter- and intra granular voltage-current characteristics, irreversibility fields, and critical current density ({ital J}{sub {ital c}}) values were very similar and characteristic of strongly coupled grains and grain boundary. The misorientation was accommodated by a set of partial dislocations with the Frank spacing of 1.9 nm. The dislocation cores appeared to be separated by relatively undistorted regions of crystal. The {ital J}{sub {ital c}} values at 25 K exceeded 10{sup 3} A/cm{sup 2} in fields of several tesla, more than two orders of magnitude larger than that found earlier in [001] twist boundaries of BSCCO-2212. This result is consistent with the view that low angle [001] tilt boundaries play an important role for current transport in polycrystalline BSCCO tapes. {copyright} {ital 1996 Materials Research Society.}

• OSTI ID: 283352
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 4 Vol. 11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BICRYSTALS
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL GROWTH
DISLOCATIONS
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
IV CHARACTERISTIC
MICROSTRUCTURE
STRONTIUM OXIDES