Microstructure of the high T sub c phase ( T sub c similar to 111 K) in the Sb-Pb-Bi-Sr-Ca-Cu-O system

Journal Article · Sun Jan 13 23:00:00 EST 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104944· OSTI ID:6227296

Kijima, N; Gronsky, R ^[1]; Endo, H; Oguri, Y ^[2]; McKernan, S K; Zettl, A ^[3]

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1. National Center for Electron Microscopy, Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (US)
2. Research Center, Mitsubishi Kasei Corporation, 1000 Kamoshida-cho, Midori-ku, Yokohama 227, (Japan)
3. Department of Physics, University of California at Berkeley and Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (US)

The microstructure of the high {ital T}{sub {ital c}} phase ({ital T}{sub {ital c}}{similar to}111 K) in the Sb-Pb-Bi-Sr-Ca-Cu-O system has been determined using transmission electron microscopy. Its crystal structure belongs to the superspace group {ital N}{sup {ital Bbmb}}{sub 1{bar 1}1}, {ital N}{sup {ital Bb}2{ital b}}{sub 111}, {ital P}{sup {ital Bbmb}}{sub 1{bar 1}1} or {ital P}{sup {ital Bb}2{ital b}}{sub 111} with subcell lattice parameters {ital a}=5.411(1) A, {ital b}=5.411(1) A, and {ital c}=37.22(6) A. The high {ital T}{sub {ital c}} phase has a modulated structure with {ital b}-axis wavelengths 26.9 and 36.1 A. Stacking faults along the {ital c} axis in the high {ital T}{sub {ital c}} phase are much less numerous than in the Bi-Sr-Ca-Cu-O system, but comparable to the Pb-Bi-Sr-Ca-Cu-O system. Sb substitution for Ca may affect the internal strain of the crystal.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6227296
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 58:2; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
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