I L Landau and H R Ott 2002 J. Phys.: Condens. Matter 14 L313 doi:10.1088/0953-8984/14/15/101
I L Landau1,2 and H R Ott1
Show affiliationsIn superconductors with large values of the Ginzburg-Landau parameter κ, exposed to magnetic fields close to the upper critical field Hc2, the magnetic field is practically homogeneous across the sample and the density of supercurrents is negligibly small. In this case, there is no obvious reason for the formation of Abrikosov vortices, characteristic for the well known mixed state. We consider an alternative model for describing the mixed state for κ>>1 and magnetic fields close to Hc2. We argue that with decreasing magnetic field the traditional vortex structure is adopted via a first-order phase transition, revealed by discontinuities in the magnetization as well as the resistivity.
74.25.Op Mixed states, critical fields, and surface sheaths
74.20.De Phenomenological theories (two-fluid, Ginzburg-Landau, etc.)
Issue 15 (22 April 2002)
Received 5 March 2002
Published 4 April 2002
I L Landau and H R Ott 2002 J. Phys.: Condens. Matter 14 L313
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