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Magnetic flux creep in high- superconducting thin films near the critical temperature
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10.1063/1.2178469
/content/aip/journal/ltp/32/3/10.1063/1.2178469
http://aip.metastore.ingenta.com/content/aip/journal/ltp/32/3/10.1063/1.2178469

Figures

Image of FIG. 1.
FIG. 1.

Temperature dependence of the imaginary part of the magnetic susceptibility for samples SP365 and PP8 ; , . The lines are an approximation for determining . .

Image of FIG. 2.
FIG. 2.

Frequency dependence of the critical current density measured by the LM method on a logarithmic scale. Sample SP365 , . The line is a fit by a dependence .

Image of FIG. 3.
FIG. 3.

Temperature dependence of the critical current density determined by the LM method (symbols) and their approximation by a dependence (curves) in the samples SP365 (a) and PP8 (b); [Hz]: 33 , 3033 . (See Table I for the parameters of the fit.)

Image of FIG. 4.
FIG. 4.

Temperature dependence of (a) for samples SP365 and PP8 and the same but in more detail near for sample SP365 (b).

Image of FIG. 5.
FIG. 5.

Temperature dependence of for samples PP8 and SP365 determined from and .

Image of FIG. 6.
FIG. 6.

Temperature dependence (from of the critical current densities ), , and determined from the measurements by the HA method and normalized at (see text). Sample PP8, .

Image of FIG. 7.
FIG. 7.

Normalized temperature dependence of the parameter , calculated according to the complete formulas of Ref. 6 (solid curve), the two-term approximation (8) (dashed curve), and the one-term approximation (9) ( , dotted line) and the experimental values obtained by the HA method (circlets). Sample PP8, .

Image of FIG. 8.
FIG. 8.

Temperature dependence of the ratio of the experimental parameter to the value calculated according to Ref. 6 . Sample PP8, . Measurements by the LM and HA methods.

Image of FIG. 9.
FIG. 9.

Behavior of the real and imaginary parts of the magnetic susceptibility near the critical temperature at magnetic field amplitudes of and . The lines just connect the dots.

Tables

Generic image for table
Table I.

The parameters of the fit of the experimental results (Fig. 3 ) by the power law .

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/content/aip/journal/ltp/32/3/10.1063/1.2178469
2006-03-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic flux creep in YBa2Cu3O7−δ high-Tc superconducting thin films near the critical temperature
http://aip.metastore.ingenta.com/content/aip/journal/ltp/32/3/10.1063/1.2178469
10.1063/1.2178469
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