Yttrium substitution for calcium in Tl[sub 2]Ba[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]]: Preparation and study of superconducting phases

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1994.1025· OSTI ID:7072664

Himmerich, B; Sabrowsky, H ^[1]; Peligrad, D N; Rosenberg, M ^[2]

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1. Universitaet Bochum (Germany)
2. Ruhr-Universitaet Bochum, Bochum (Germany)

Starting from the nominal composition Tl[sub 2]Ba[sub 2]Ca[sub 2[minus]x]Y[sub x]Cu[sub 3]O[sub 10+[delta]] after heat treatments in Ar atmosphere in gold sealed tubes, both superconducting phases [open quotes]2223[close quotes] and [open quotes]2212[close quotes] and the paramagnetic phase BaCuO[sub 2] were present for zero and low Y concentration (0 [le] x [le] 0.3). The decrease of the critical temperature from 126 to 118 K for the 2223 phase and from 114 to 100 K for the 2212 phase was considered as evidence for Y substitution on Ca sites for low x values and corresponding reduction of the hole concentration per Cu atom. Higher Y concentration (x [ge] 0.3) destabilize the superconducting phases.

• OSTI ID: 7072664
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 108:1; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

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& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
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COPPER COMPOUNDS
CUPRATES
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OXYGEN COMPOUNDS
PHASE STUDIES
STOICHIOMETRY
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THALLIUM COMPOUNDS
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