Resistive transition curves in magnetic fields for Tl sub 2 Ba sub 2 Ca sub n minus 1 Cu sub n O sub y ( n =1, 2, 4) compounds: Dependence on the number of Cu-O layers
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Sanyo Tsukuba Research Center, 2-1 Koyadai, Tsukuba, Ibaraki 305 (Japan)
- National Research Institute for Metals, Tsukuba Laboratories, 1-2-1, Sengen, Tsukuba, Ibaraki (Japan)
A systematic measurement of the superconducting resistive transition curves in magnetic fields has been performed for Tl{sub 2}Ba{sub 2}Ca{sub {ital n}{minus}1}Cu{sub {ital n}}O{sub {ital y}} ({ital n}=1, 2, 4) compounds. It is found that the broadening of the transition curves varies systematically with the number of Cu-O layers (i.e., the value {ital n}). The slope of the field-versus-temperature curves in fields parallel to the {ital c} plane increases with decreasing {ital n}, while the slope in perpendicular fields is almost independent of {ital n}. This result suggests that the upper critical fields and the coherence lengths of these compounds have a strong correlation with {ital n}. It is concluded that the coherence length along the {ital c} axis of Tl{sub 2}Ba{sub 2}CuO{sub {ital y}} is smaller than the thickness of the Tl-O-layer region. According to the Josephson-coupled layer model, Tl{sub 2}Ba{sub 2}CuO{sub {ital y}} is expected to be a two-dimensional superconductor.
- OSTI ID:
- 6436998
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:4; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Sat Oct 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6824501
Polarized x-ray-absorption study of Tl[sub 2]Ba[sub 2]CaCu[sub 2]O[sub 8] and Tl[sub 2]Ba[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10]
Journal Article
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Fri Oct 01 00:00:00 EDT 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:6108521
Pressure dependence of the superconducting critical temperature of Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{ital y}} and Tl{sub 2}Ba{sub 2}Ca{sub 3}Cu{sub 4}O{sub 12+{ital y}} up to 21 GPa
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Tue Oct 01 00:00:00 EDT 1996
· Physical Review, B: Condensed Matter
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OSTI ID:385710
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENCE LENGTH
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
CRYSTALS
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
LAYERS
LENGTH
MAGNETIC FIELDS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENCE LENGTH
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
CRYSTALS
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
LAYERS
LENGTH
MAGNETIC FIELDS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS