Processing high- Tc superconductors with GeV heavy ions. [0. 58 Gev Sn and 1. 0 GeV Au ions; YBa sub 2 Cu sub 3 O sub 7 and Bi sub 2 Sr sub 2 CaCu sub 2 O sub 8]
- International Business Machines Corp., Yorktown Heights, NY (United States). Thomas J. Watson Research Center
- Argonne National Lab., IL (United States)
- Oak Ridge National Lab., TN (United States)
Irradiation of high-{Tc} superconducting crystals with low doses (10{sup 10}--10{sup 11} ions/cm{sup 2}) of GeV heavy ions (0.58 GeV Sn-116; 1.0-GeV Au-197) produces a unique microstructure consisting of discrete amorphous columns which are only a few nm in diameter but tens of microns long. It has been found recently that this columnar microstructure causes larger increases in magnetization and critical current at high temperature and high magnetic field than other types of defects in these materials. This can be understood as a consequence of the effective pinning of magnetic vortex lines provided by the columnar defects. Measurements confirm that the pinning is strongest when the magnetic field is aligned with the ion tracks. Differences in the pinning in different materials can be related to differences in their anisotropy, which affects the structure of the vortices and their pinning at columnar defects.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7203717
- Report Number(s):
- ANL/CP-77183; CONF-9209200--3; ON: DE92040755; CNN: STC-8809854
- Country of Publication:
- United States
- Language:
- English
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ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BEAMS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ENERGY RANGE
EVEN-EVEN NUCLEI
GEV RANGE
GOLD 197 BEAMS
HEAVY IONS
HIGH-TC SUPERCONDUCTORS
INTERMEDIATE MASS NUCLEI
ION BEAMS
IONS
ISOTOPES
MAGNETIC FLUX
MAGNETIZATION
MICROSCOPY
MICROSTRUCTURE
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
STABLE ISOTOPES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TIN 116
TIN IONS
TIN ISOTOPES
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES