Lower critical fields in an ellipsoid-shaped YBa[sub 2]Cu[sub 3]O[sub 6. 95] single crystal
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T1Z1 (Canada)
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S4M1 (Canada)
The lower critical fields of YBa[sub 2]Cu[sub 3]O[sub 6.95] have been determined by magnetization [ital M]([ital H]) measurements using an ellipsoidal-shaped crystal and a thin platelet for [bold H][parallel][ital c] and [bold H][perpendicular][ital c], respectively. Careful data analysis rules out the effects of surface barriers. The data show a linear temperature dependence of [ital H][sub [ital c]1] below about 0.5[ital T][sub [ital c]], with [ital H][sub [ital c]1](0)=1100 Oe and 200 Oe for [bold H][parallel][ital c] and [bold H][perpendicular][ital c], respectively. The anisotropy factor [gamma] is almost temperature independent and has the value 5.6[plus minus]0.3. By comparison of the [ital H][sub [ital c]1] data to results of London penetration-depth measurements, the vortex core energy is found to be linear with temperature.
- OSTI ID:
- 6669417
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:6; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL FIELD
CRYSTALS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETIC PROPERTIES
MAGNETIZATION
MIXED STATE
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL FIELD
CRYSTALS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETIC PROPERTIES
MAGNETIZATION
MIXED STATE
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES