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}}
- Applied Superconductivity Center, Materials Science Program, Madison, Wisconsin 53706 (United States)
- Applied Superconductivity Center, University of Wisconsin, Madison, Wisconsin 5306 (United States)
- Applied Superconductivity Center, Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
- Ceramics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
- Applied Superconductivity Center, Department of Materials Science and Engineering, Materials Science Program, Madison , Wisconsin 53706 (United States)
- 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, Vol. 11, Issue 4; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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