Studies of the superconducting behavior of polycrystalline YBa[sub 2]Cu[sub 3]O[sub 7-[delta]]
Thesis/Dissertation
·
OSTI ID:7233501
The results of electrical transport and AC susceptibility measurements performed with the goal of studying the superconducting and normal state electrical properties of polycrystalline samples of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] and Ag/YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] are reported. I-V characteristics and AC susceptibility for [approximately]2 mm diameter sintered polycrystalline YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] pellets are studied at selected magnetic fields 0.1 [le] H [le] 80.9 G and for 80 [le] T [le] 92 K. Temperature dependent changes in I-V isotherms near the superconducting transition are consistent with predictions of critical scaling associated with a superconducting phase transition. AC susceptibility measurements reveal a variety of interesting phenomena, and in particular provide evidence that these materials are gauge glass granular superconductors. Magnetic field and temperature dependent changes in the I-V characteristics of [approximately]15 [mu]m diameter Ag/YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] fibers are studied for 4 [le] T [le] 86 K, for 0.5 [le] H [le] 9000 G, and for 1 [le] J [le] 10[sup 4] A/cm[sup 2]. These measurements reveal a variety of quite different regions of superconducting behavior that are all consistent with a system of weakly coupled superconducting grains.
- Research Organization:
- Massachusetts Univ., Amherst, MA (United States)
- OSTI ID:
- 7233501
- Country of Publication:
- United States
- Language:
- English
Similar Records
[ital I]-[ital V] characteristics and the superconducting transition in polycrystalline YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]
ac susceptibility and grain-boundary pinning strengths in YBa sub 2 Cu sub 3 O sub 7 minus. delta. and YBa sub 2 Cu sub 2. 985 Ag sub 0. 015 O sub 7 minus. delta
Temperature- and field-dependent I-V characteristics of an Ag/YBa sub 2 Cu sub 3 O sub 7 minus. delta. fiber
Journal Article
·
Sun Aug 01 00:00:00 EDT 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:5578956
ac susceptibility and grain-boundary pinning strengths in YBa sub 2 Cu sub 3 O sub 7 minus. delta. and YBa sub 2 Cu sub 2. 985 Ag sub 0. 015 O sub 7 minus. delta
Journal Article
·
Tue May 01 00:00:00 EDT 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:6883828
Temperature- and field-dependent I-V characteristics of an Ag/YBa sub 2 Cu sub 3 O sub 7 minus. delta. fiber
Journal Article
·
Wed May 01 00:00:00 EDT 1991
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:5592070
Related Subjects
36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGE TRANSPORT
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
INTERMETALLIC COMPOUNDS
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGE TRANSPORT
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
INTERMETALLIC COMPOUNDS
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES