Large T{sub c} depression at low angle [100] tilt grain boundaries in bulk Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} bicrystals

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.118514· OSTI ID:467169

Li, Q; Tsay, Y N; Zhu, Y; Suenaga, M ^[1]; Gu, G D ^[2]; Koshizuka, N ^[3]

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1. Department of Applied Science, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. School of Physics, University of New South Wales, Kensington, New South Wales 2033 (Australia)
3. Superconductivity Research Laboratory, ISTEC, 10-13, Shinonome I-chrome, Koto-ku, Tokyo 135 (Japan)

Large depression of T{sub c} at 7{degree} [100] tilt grain boundaries was observed in bulk Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} (Bi2212) bicrystals by measuring the zero-field electrical transport properties of the grain boundaries and the constituent single crystals over an extended range of currents and voltages. The T{sub c}-depressed region was determined to be around 20 nm, comparable to the width of the strain field associated with the observed array of grain-boundary dislocations. Superconducting coupling of the grain boundaries increases sharply as temperature decreases below the grain-boundary T{sub c}{congruent}68 K. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 467169
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 9 Vol. 70; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BICRYSTALS
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
CURRENT DENSITY
DISLOCATIONS
ELECTRIC CONDUCTIVITY
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
STRONTIUM OXIDES
TRANSITION TEMPERATURE