Critical currents in proton-irradiated single-crystal Ba sub 2 YCu sub 3 O sub 7 minus. delta

Irradiation with 3.5 MeV protons creates defects in Ba{sub 2}YCu{sub 3}O{sub 7{minus}{delta}}, which can act as strong pinning sites, comparable to those produced by neutron irradiation. Indeed protons as well as neutrons undergo momentum-transferring collisions that result in atomic displacements;...

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Veröffentlicht in:Applied physics letters 1990-06, Vol.56:26
Hauptverfasser: van Dover, R.B., Gyorgy, E.M., White, A.E., Schneemeyer, L.F., Felder, R.J., Waszczak, J.V.
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container_title Applied physics letters
container_volume 56:26
creator van Dover, R.B.
Gyorgy, E.M.
White, A.E.
Schneemeyer, L.F.
Felder, R.J.
Waszczak, J.V.
description Irradiation with 3.5 MeV protons creates defects in Ba{sub 2}YCu{sub 3}O{sub 7{minus}{delta}}, which can act as strong pinning sites, comparable to those produced by neutron irradiation. Indeed protons as well as neutrons undergo momentum-transferring collisions that result in atomic displacements; the additional electronic proton-solid interaction does not appear to yield defects which contribute to pinning. Under optimized conditions we have obtained {ital J}{sub {ital c}}({ital T}{r arrow}0, {ital H}=1 T){similar to}2{times}10{sup 7} A/cm{sup 2} in single crystals. At 77 K the value is still {ital J}{sub {ital c}}{similar to}1.7{times}10{sup 5} A/cm{sup 2}, decreasing only threefold in a field of 6 T. The fluence and temperature dependence of {ital J}{sub {ital c}} suggest a model, in which spatially uncorrelated defects pin vortex cores.
doi_str_mv 10.1063/1.103269
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Indeed protons as well as neutrons undergo momentum-transferring collisions that result in atomic displacements; the additional electronic proton-solid interaction does not appear to yield defects which contribute to pinning. Under optimized conditions we have obtained {ital J}{sub {ital c}}({ital T}{r arrow}0, {ital H}=1 T){similar to}2{times}10{sup 7} A/cm{sup 2} in single crystals. At 77 K the value is still {ital J}{sub {ital c}}{similar to}1.7{times}10{sup 5} A/cm{sup 2}, decreasing only threefold in a field of 6 T. The fluence and temperature dependence of {ital J}{sub {ital c}} suggest a model, in which spatially uncorrelated defects pin vortex cores.</abstract><cop>United States</cop><doi>10.1063/1.103269</doi></addata></record>
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ispartof Applied physics letters, 1990-06, Vol.56:26
issn 0003-6951
1077-3118
language eng
recordid cdi_osti_scitechconnect_7073141
source AIP Digital Archive
subjects 360206 - Ceramics, Cermets, & Refractories- Radiation Effects
656100 - Condensed Matter Physics- Superconductivity
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BARYONS
CHALCOGENIDES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MATERIALS SCIENCE
MEV RANGE
MEV RANGE 01-10
MONOCRYSTALS
NUCLEONS
ORDER PARAMETERS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
PROTONS
RADIATION EFFECTS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
title Critical currents in proton-irradiated single-crystal Ba sub 2 YCu sub 3 O sub 7 minus. delta
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