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VOLUME 81 (2005) | ISSUE 11 | PAGE 717
Anisotropy of the upper critical field in MgB2: the two-band Ginzburg-Landau theory
PACS: 74.20.De
Abstract
The temperature dependence of the anisotropy parameter of upper critical field \gamma _{H_{c2}}(T)={H_{c2}^{\parallel }(T)}/{H_{c2}^{\perp }(T)} is calculated using two-band Ginzburg-Landau theory for layered superconductors. It is shown that, with decreasing temperature anisotropy parameter γ (T) is increased. Result of calculations are in agreement with experimental data for single crystals of MgB2 and with other calculations.