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 00:00:00 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 Lab. (BNL), Upton, NY (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 467169
• Journal Information: Applied Physics Letters, Vol. 70, Issue 9; Other Information: PBD: Mar 1997
• Country of Publication: United States
• Language: English

Related Subjects

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