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Low Temperature Physics / Volume 37 / Issue 12

Low Temp. Phys. 37, 979 (2011); http://dx.doi.org/10.1063/1.3674213 (7 pages)

Resistive current state of a wide superconducting film

I. V. Zolochevskii

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, prospekt Lenina 47, Kharkov 61103, Ukraine

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The current-voltage characteristics (CVCs) of vortex superconducting films are investigated in a wide temperature range. It is shown for the first time that the experimental CVCs and their parameters are described well enough by asymptotic formulas within the theory of the vortex resistive state of Aslamazov-Lempitsky (AL). It is established that for wide films, the critical current of which corresponds to the AL theory, the differential resistance of a linear segment of a CVC does not depend on temperature that agrees with the model of the vortex resistive state of AL. In the range of much higher temperatures, where the critical current is Ic(T)∝(1−T/Tc)3/2, the decrease of the differential resistance with increasing the temperature is observed that corresponds to predictions of the AL theory. However, in the close vicinity of Tc the increase of the differential resistance of a linear vortex segment of CVCs was found at T → Tc. This effect does not have an explanation in modern theories of a vortex state.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. SAMPLES AND EXPERIMENTAL TECHNIQUE
  3. A CURRENT-VOLTAGE CHARACTERISTIC OF A WIDE SUPERCONDUCTING FILM IN THE ABSENCE OF MAGNETIC FILED AT TEMPERATURE NEAR CRITICAL
  4. EXPERIMENTAL RESULTS AND THEIR DISCUSSION
  5. CONCLUSION

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KEYWORDS and PACS

Keywords

critical currents, mixed state, superconducting thin films

PACS

  • 74.25.Op

    Mixed states, critical fields, and surface sheaths

  • 74.25.Sv

    Critical currents

  • 74.78.-w

    Superconducting films and low-dimensional structures

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3674213

PUBLICATION DATA

ISSN

1063-777X (print)  
1090-6517 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    D. Y. Vodolazov and F. M. Peeters, Phys. Rev. B 76, 014521-1 (2007).


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