Enhancement of flux pinning by Pr doping in Y[sub 1[minus][ital x]]Pr[sub [ital x]]Ba[sub 2]Cu[sub 3]O[sub 7[minus][delta]] (0[le][ital x][le]0. 4)
- Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (United States)
Magnetic relaxation measurements in a magnetic field of 5 kOe at temperatures 5 K [le][ital T][le]90 K have been made on the system Y[sub 1[minus][ital x]]Pr[sub [ital x]]Ba[sub 2]Cu[sub 3]O[sub 7[minus][delta]] for 0[le][ital x][le]0.4. The measurements reveal two peaks in the normalized logarithmic decay of the magnetization [ital S] as a function of temperature for the full range of Pr concentrations studied. The occurrence of the second peak in [ital S] could be a reflection of the softening of the flux lattice on approaching the melting line. Both the pinning energy at 27 K and the intragranular critical current density at 10 K exhibit maxima at [ital x][approx]0.1--0.2, with values that are about twice the corresponding values at [ital x]=0.
- DOE Contract Number:
- FG03-86ER45230
- OSTI ID:
- 6891389
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:17; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DOPED MATERIALS
ELECTRIC CURRENTS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
RELAXATION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES