Thermally assisted flux flow in epitaxial Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} thin films: Estimation of the anisotropy parameter

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Journal of Superconductivity

DOI:https://doi.org/10.1007/BF00732383· OSTI ID:102686

Miu, L ^[1]; Wagner, P; Hadish, A ^[2]

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1. Institut fuer Festkoerperphysik, Darmstadt (Germany)
2. Institut fuer Festkoeperphysik, Darmstadt (Germany); and others

The thermally activated flux motion in transport-current-carrying epitaxial Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} thin films was investigated by conventional resistive measurements, with the magnetic field B applied parallel to the c-axis and ranging between 10mT and 3T. It was found that the magnetic field and temperature dependence of the activation energy, as well as the form of the irreversibility line in the thermally assisted flux glow regime, change significantly at a field value B{sub cr}{approximately}0.1 T. This behavior is similar to that reported by us in the case of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} thin films, and was interpreted in terms of the occurrence of a dimensional crossover in the vortex system, due to the increase of the tilt modulus at low fields. We determined an anisotropy factor {gamma}{approximately}140 for our Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} films, which is lower than that observed for the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} films.

• Sponsoring Organization: USDOE
• OSTI ID: 102686
• Journal Information: Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 2 Vol. 8; ISSN 0896-1107; ISSN JOUSEH
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ACTIVATION ENERGY
ANISOTROPY
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
STRONTIUM COMPOUNDS
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
THIN FILMS