Properties of aligned YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} superconductor as a function of oxygen deficiency {delta}
Conference
·
OSTI ID:10187791
- Talca Univ. (Chile). Faculty of Natural Resources
- Tennessee Univ., Knoxville, TN (United States). Dept. of Physics
- Oak Ridge National Lab., TN (United States)
- General Electric Co., Schenectady, NY (United States). Corporate Research and Development Lab.
Systematic studies of flux pinning and intragrain critical current J{sub c} were conducted in magnetically aligned, sintered Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7-{delta}} material as a function of oxygen deficiency {delta} in the range 0 {approximately} 0.2. The essential findings are: (1) maximum J{sub c} occurred at full oxygenation, i.e., J{sub c} and pinning decreased steadily as oxygen was removed; (2) the irreversibility line B{sub irr}(T,{delta}) was degraded with the introduction of oxygen defects; (3) this degradation was strongly correlated with the reduction of J{sub c}({delta}), implying that the irreversibility line is determined by the strength of the flux pinning defects; (4) the condensation energy F{sub c} decreased significantly with {delta}, indicating a rapid weakening in the effectiveness of pre-existing pinning centers; (5) both {lambda} and {xi} increased as oxygen was removed, while (6) their ratio {kappa} and the superconductive anisotropy parameter {gamma} = ({lambda}{sub c}/{lambda}{sub ab}) {approx} 5 varied little for {delta} {le} 0.2.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10187791
- Report Number(s):
- CONF-920916--2; ON: DE93001707
- Country of Publication:
- United States
- Language:
- English
Similar Records
Properties of aligned YBa[sub 2]Cu[sub 3]O[sub 7-[delta]] superconductor as a function of oxygen deficiency [delta]
Influence of oxygen deficiency on the superconductive properties of grain-aligned YBa sub 2 Cu sub 3 O sub 7 minus. delta
Magnetic studies of current conduction and flux pinning in high-Tc cuprates: Virgin, irradiated, and oxygen deficient materials
Conference
·
Tue Dec 31 23:00:00 EST 1991
·
OSTI ID:7018297
Influence of oxygen deficiency on the superconductive properties of grain-aligned YBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
Mon Jun 01 00:00:00 EDT 1992
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:7110714
Magnetic studies of current conduction and flux pinning in high-Tc cuprates: Virgin, irradiated, and oxygen deficient materials
Conference
·
Tue Sep 01 00:00:00 EDT 1992
·
OSTI ID:10185730