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Processing high-{Tc} superconductors with GeV heavy ions

Conference ·
OSTI ID:10182268
; ; ; ;  [1]; ;  [2]; ; ;  [3]
  1. International Business Machines Corp., Yorktown Heights, NY (United States). Thomas J. Watson Research Center
  2. Argonne National Lab., IL (United States)
  3. Oak Ridge National Lab., TN (United States)
+ Show Author Affiliations

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:
USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
10182268
Report Number(s):
ANL/CP--77183; CONF-9209200--3; ON: DE92040755; CNN: Contract STC-8809854
Country of Publication:
United States
Language:
English

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Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070205
36 MATERIALS SCIENCE
360206
360207
BARIUM OXIDES
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
GEV RANGE
GOLD 197 BEAMS
HEAVY IONS
HIGH-TC SUPERCONDUCTORS
ION BEAMS
MAGNETIC FLUX
MAGNETIZATION
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TIN 116
TIN IONS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM OXIDES