Growth of nucleation sites on Pb-doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}}

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.116398· OSTI ID:277181

Finnemore, D K; Xu, M; Kouzoudis, D; Bloomer, T; Kramer, M J ^[1]; McKernan, S ^[2]; Balachandran, U ^[3]; Haldar, P ^[4]

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1. Ames Laboratory, USDOE and Department of Physics, Iowa State University, Ames, Iowa 50011 (United States)
2. High Resolution Microscopy Center, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
3. Energy Technology Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
4. Intermagnetics General Corporation, Latham, New York 12110 (United States)

In the growth of Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} from mixed powders of Pb-doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} and other oxides, it has been discovered that a dense array of hillocks or mesas grow at the interface between a Ag overlay and Pb-doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} grains during the ramp up to the reaction temperature. As viewed in an environmental scanning electron microscope, the Ag coated grains develop a texture that looks like {open_quote}{open_quote}chicken pox{close_quote}{close_quote} growing on the grains at about 700{degree}C. These hillocks are about 100 nm across and are spaced at about 500 to 1000 nm. If there is no Ag, this texture does not develop. Preliminary measurements indicate that the hillocks are a recrystallization of (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}}, and are definitely not a Pb rich phase. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38; W-7405-ENG-82
• OSTI ID: 277181
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 68; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
DOPED MATERIALS
GRAINS
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
LEAD ADDITIONS
MICROSTRUCTURE
NUCLEATION
POWDERS
SCANNING ELECTRON MICROSCOPY
SEM
STRONTIUM OXIDES
SUPERCONDUCTING CABLES
SUPERCONDUCTING MAGNETS
SYNTHESIS
TEXTURE