Thermally activated dissipation in a long-term-annealed single crystal of Bi sub 2 Sr sub 2 CaCu sub 2 O sub x
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (US)
We have measured the resistivity of a long-term-annealed Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital x}} single crystal in magnetic fields up to 9 T. We found a nonlinear Arrhenius plot of resistive tails. This result differs sharply from previous observations. The fitting of the Arrhenius plot with thermally activated behavior of the form {rho}={rho}{sub 0}({ital H})exp({minus}{ital U}{sub 0}({ital T},{ital H})/{ital kT}) shows that the temperature and field dependence of the activation energy follows {ital U}{sub 0}={ital A}({ital H})(1{minus}{ital T}/{ital T}{sub {ital c}}){sup {ital m}} with {ital m}{gt}1. The prefactor {rho}{sub 0} has been found to be smaller than {rho}{sub {ital n}}, the normal-state resistivity at {ital T}{sub {ital c}}, and proportional to {ital H}/{ital H}{sub {ital c}2}. The possible mechanism associated with this nonlinear Arrhenius plot is discussed.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6072893
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:1; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
ARRHENIUS EQUATION
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EQUATIONS
FLUCTUATIONS
HEAT TREATMENTS
LOW TEMPERATURE
MINERALS
MONOCRYSTALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
VERY LOW TEMPERATURE