Effects of iodine intercalation into Bi-based copper oxide superconductors
- Tohoku Univ., Sendai (Japan)
We have investigated the stage-1 iodine-intercalation compounds, whose host materials are Bi[sub 2]Sr[sub 2]Ca[sub 1[minus]x]Y[sub x]Cu[sub 2]O[sub 8] (Bi-2212 phase) and Bi[sub 1.6]Pb[sub 0.5]Sr[sub 1.9[minus]x]La[sub x]Cu[sub 1.05]O[sub 6] (Bi-2201 phase) with various x values. In the Bi-2212 phase, it has been found that the change in Tc through the stage-1 iodine intercalation is due to two effects: a change of the two-dimensionality and an increase in the carrier number. The former effect decreases Tc by about 10 K independent of the carrier number of the host sample. The latter effect shifts the x dependence of Tc to larger x values by about 0.08, taking account of oxygen release from the host samples during the intercalation process. This result is clear evidence for the occurrence of both the change of two-dimensionality and the increase in carrier number about 0.04 per CuO[sub 2] unit due to the charge transfer through the stage-1 iodine intercalation. In the Bi-2201 phase, Tc decreases by about 10 K through the stage-1 iodine intercalation. 4 refs., 3 figs.
- OSTI ID:
- 7020677
- Report Number(s):
- CONF-930710-; CODEN: JOUSEH; TRN: 94-014480
- Journal Information:
- Journal of Superconductivity; (United States), Vol. 7:1; Conference: Physics and chemistry of molecular and oxide superconductors conference, Eugene, OR (United States), 27-31 Jul 1993; ISSN 0896-1107
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HIGH-TC SUPERCONDUCTORS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
ANNEALING
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CERAMICS
CLATHRATES
CUPRATES
IODINE
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
OXIDES
STRONTIUM COMPOUNDS
YTTRIUM COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
DIFFRACTION
ELEMENTS
HALOGENS
HEAT TREATMENTS
NONMETALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360204 - Ceramics
Cermets
& Refractories- Physical Properties
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies