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Träfflista för sökning "WFRF:(Johansson Östen) srt2:(1990-1999)"

Search: WFRF:(Johansson Östen) > (1990-1999)

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1.
  • Lundqvist, Björn, et al. (author)
  • Cutoff of the vortex-glass behavior in Tl(2)Ba(2)CaCu(2)O(8+delta) superconducting thin films
  • 1998
  • In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 58:10, s. 6580-6584
  • Journal article (peer-reviewed)abstract
    • The vortex dynamics of a Tl(2)Ba(2)CaCu(2)O(8+delta) thin film has been measured by electrical resistivity and I-V characteristics. The temperature T*(B) defined from a vortex-glass analysis of the resistivity in the vortex liquid state using the Vogel-Fulcher relation is shown to be consistent with a vortex-glass-like scaling of the I-V characteristics in the high dissipation regime. Below T*, there is however a significant temperature range in which the flux creep does not vanish at low currents. This suggests that the transition into a glassy vortex state is cut off at some length scale.
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2.
  • Lundqvist, Björn, et al. (author)
  • Vortex dynamics in a thin film of Tl2Ba2CuO6
  • 1999
  • In: Journal of Low Temperature Physics. - 0022-2291 .- 1573-7357. ; 117:5-6, s. 1441-1445
  • Journal article (peer-reviewed)abstract
    • The vortex dynamics in a Tl2Ba2CuO6 (Tl-2201) thin film with a critical temperature T-c = 80.8 K has been studied by electrical resistivity measurements for magnetic fields 0 less than or equal to B less than or equal to 12 T. The vortex glass line, as determined from the disappearance of linear resistivity, was found to be well described by B-g (T) = B-0[(1 - T/T-c)/(T/T-c)(alpha), with B-0 approximate to 0.65 T and alpha approximate to 1.9. The glass line of Tl-2201 is observed to be located below the one of Tl2Ba2CaCu2O8+delta (Tl-2212) in a magnetic phase diagram based on a reduced temperature scale T/T-c, thus suggesting a higher anisotropy for Tl-2201.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Andersson, Magnus (2)
Rapp, Östen (2)
Lundqvist, Björn (2)
Johansson, L. G. (2)
Ivanov, Z G (2)
Larsson, J. (1)
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Chen, H.Q. (1)
Herting, Anna (1)
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University
Royal Institute of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

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