The effect of the neutron irradiation on the critical current and the microstructure of the melt-textured growth YBa sub 2 Cu sub 3 O sub y

Journal Article · Sat Aug 10 04:00:00 EDT 1991 · Modern Physics Letters B; (Singapore)

OSTI ID:7048117

Hongtao, R; Ling, X; Qing, H ^[1]; Yunlu, Z; Weidong, B; Huijan, L; Ruikun, W; Beiling, S ^[2]

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1. Dept. of Superconductivity, General Research Inst. for Non-ferrous Metals, Beijing 100088 (CN)
2. Dept. of Analysis and Testing, General Research Inst. for Non-ferrous Metals, Beijing 100088 (CN)

This paper reports on the effect of the fast neutron irradiation on the critical current properties and the microstructure of Melt-Textured Growth (MTG) YBa{sub 2}Cu{sub 3}O{sub 7{minus}8} with fluences of 2.3 {times} 10{sup 16} n/cm{sup 2}, 1.16 {times} 10{sup 17} n/cm{sup 2}, and 5.8 {times} 10{sup 17} n/cm{sup 2} respectively. The hysteresis loops have been measured at 77 K and 1.5 K in the applied magnetic fields between {minus}6 T and 6 T. The irreversibility lines H(T*) were also demonstrated. The critical magnetization current density J{sub c} is up to 4.7 {times} 10{sup 5} A/cm{sup 2} at 77 K in the field of 0.1 T for the irradiated sample with the fluence of 1.16 {times} 10{sup 17} n/cm{sup 2}. It is tenfold higher than that of the unirradiated sample. This increase of J{sub c} is due to the pinning at irradiation-induced pinning centers. Much higher neutron irradiation with fluence of 5.8 {times} 10{sup 17} n/cm{sup 2} is harmful to the increase of J{sub c} value because the orthorhombic structure has been transformed into the tetragonal one. The amorphous state and the cellular structures are also observed in the irradiated MTG sample.

• OSTI ID: 7048117
• Journal Information: Modern Physics Letters B; (Singapore), Journal Name: Modern Physics Letters B; (Singapore) Vol. 5:18; ISSN 0217-9849; ISSN MPLBE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
AMORPHOUS STATE
BARIUM COMPOUNDS
BARYONS
COPPER COMPOUNDS
CRITICAL CURRENT
CRYSTAL GROWTH
CRYSTAL STRUCTURE
CUPRATES
CURRENTS
ELECTRIC CURRENTS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HYSTERESIS
MAGNETIC FIELDS
MAGNETIZATION
MELTING
MICROSTRUCTURE
NEUTRON FLUENCE
NEUTRONS
NUCLEONS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0065-0273 K
TEXTURE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS