Neutron-irradiation effects on critical current densities in single-crystalline YBa sub 2 Cu sub 3 O sub 7 minus. delta

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.3091· OSTI ID:5548223

Sauerzopf, F M; Wiesinger, H P; Kritscha, W; Weber, H W ^[1]; Crabtree, G W ^[2]; Liu, J Z ^[3]

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1. Atominstitut der Oesterreichischen Universitaeten, A-1020 Wien (Austria)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)
3. Department of Physics, University of California, Davis, California 95616 (USA)

Neutron-irradiation experiments were made on two high-quality YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals in the fluence range from 2{times}10{sup 21} to 2{times}10{sup 22} m{sup {minus}2} ({ital E}{gt}0.1 MeV). Critical current densities {ital J}{sub {ital c}} and volume-pinning forces {ital P}{sub {ital V}} were obtained from magnetization measurements in the temperature range from 5 to 77 K, for magnetic fields up to 8 T, and for field orientations parallel and perpendicular to the crystallographic {ital c} direction. All evaluations were made on the basis of an extended anisotropic Bean model. The results show large enhancements of flux pinning, in particular at low neutron fluences, a strong reduction of {ital J}{sub {ital c}} anisotropy, and significant changes of the temperature dependence of {ital J}{sub {ital c}}. The complicated (nonlinear) dependence of critical current densities and pinning forces on neutron fluence is discussed in terms of an interaction between the radiation-induced defects with the preirradiation defect structure, based on electron microscopy of individual defects and the defect distribution measured in one crystal after neutron irradiation to 2{times}10{sup 22} m{sup {minus}2} ({ital E}{gt}0.1 MeV).

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5548223
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:4; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
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Cermets
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656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BARYONS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTALS
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
LOW TEMPERATURE
MAGNETIC FLUX
MAGNETIZATION
MICROSCOPY
MONOCRYSTALS
NEUTRONS
NUCLEONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES