Radiation induced flux pinning in YBa[sub 2]Cu[sub 3]O[sub 7-[delta]] single crystal
Radiation damage studies have been carried out to determine the changes in superconducting critical current density that results for different choices of radiation direction and magnetic field direction relative to the crystallographic axes. Single crystals of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] were irradiated with a beam of 200 MeV protons directed either parallel to the a-b plane or parallel to the c-axis. These beams created rather light damage in the form of interstitials and voids that subsequently coalesced to clusters of extra atoms in the a-b plane directed along the (100) direction. For low fluence, the main change was in the c-axis critical current density, J[sub c][sup c]. For fluence in the 10[sup 12]-10[sup 14] protons/cm[sup 2] range, J[sub c][sup c] showed a major increase whereas the in-plane critical current density, Jc[sup ab] much less. There also was a large in-plane anisotropy of J[sub c][sup c] with J[sub c][sup c] five to ten times larger for the field parallel to the damage tracks. For fluences in the range of 10[sup 16] protons/cm[sup 2], both J[sub c][sup c] showed large increases to values in the 2 [times] 10[sup 6] A/cm[sup 2] range. Annealing studies at room temperature showed that both J[sub c][sup c] and J[sub c][sup ab] decreased 20 to 30%.
- Research Organization:
- Iowa State Univ. of Science and Technology, Ames, IA (United States)
- OSTI ID:
- 7181788
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM OXIDES
CURRENT DENSITY
MAGNETIC FLUX
CUPRATES
HIGH-TC SUPERCONDUCTORS
PHYSICAL RADIATION EFFECTS
YTTRIUM OXIDES
CRITICAL CURRENT
INTERMETALLIC COMPOUNDS
MONOCRYSTALS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
OXIDES
OXYGEN COMPOUNDS
RADIATION EFFECTS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360206 - Ceramics
Cermets
& Refractories- Radiation Effects