Critical current density and flux pinning dominated by neutron irradiation induced defects in YBa sub 2 Cu sub 3 O sub 7 minus x

Journal Article · Fri Nov 15 04:00:00 EST 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.349891· OSTI ID:5096811

Lessure, H S; Simizu, S; Sankar, S G; McHenry, M E ^[1]; Cost, J R; Maley, M P ^[2]

---

1. Department of Metallurgical Engineering and Materials Science, Carnegie Mellon University, Pittsburgh, Pennsylvania (USA)
2. Los Alamos National Laboratory, Los Alamos, New Mexico (USA)

The functional dependence of critical current density ({ital J}{sub {ital c}}) upon defect density is studied with neutron irradiation of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}. Identical polycrystalline samples of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} have been irradiated with fast neutrons ({ital E}{gt}0.1 MeV) in eight steps between 0 and 2.1 {times} 10{sup 18} n/cm{sup 2}. Critical current densities are obtained from magnetic hysteresis measurements and correlated with defect density measurements obtained from transmission electron microscopy. We observe that despite the existence of a significant degree of hysteresis in the as grown material the hysteretic {ital J}{sub {ital c}} in the irradiated samples appears to be dominated by a power law dependence on neutron fluence with an exponent of approximately 1/3 over a wide range of temperature, field and fluence.

• OSTI ID: 5096811
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:10; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BARYONS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
ENERGY RANGE
FAST NEUTRONS
FERMIONS
HADRONS
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
MAGNETIC FLUX
MEV RANGE
MEV RANGE 01-10
MICROSCOPY
NEUTRONS
NUCLEONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
QUATERNARY COMPOUNDS
RADIATION EFFECTS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES