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      Anisotropy of critical fields in MgB2: Two-Band ginzburg-landau theory for layered superconductors

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      Author
      Askerzade, I. N.
      Tanatar, Bilal
      Date
      2009
      Source Title
      Communications in Theoretical Physics
      Print ISSN
      0253-6102
      Electronic ISSN
      1572-9494
      Publisher
      IOP Institute of Physics Publishing
      Volume
      51
      Issue
      3
      Pages
      563 - 569
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The temperature dependence of the anisotropy parameter of upper critical field γHc2 (T) Hc2 (T)/Hc2 (T) and London penetration depth γλ(T) λ(T)/λ (T) are calculated using two-band Ginzburg-Landau theory for layered superconductors. It is shown that, with decreasing temperature the anisotropy parameter γHc2 (T) is increased, while the London penetration depth anisotropy γλ(T) reveals an opposite behavior. Results of our calculations are in agreement with experimental data for single crystal MgB2 and with other calculations. Results of an analysis of magnetic field Hc1 in a single vortex between superconducting layers are also presented.
      Keywords
      Critical magnetic fields
      Ginzburgïlandau theory
      Layered superconductors
      Two-band superconductivity
      Permalink
      http://hdl.handle.net/11693/22745
      Published Version (Please cite this version)
      http://dx.doi.org/10.1088/0253-6102/51/3/36
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