ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The magnetic field distribution in pure type II superconductors is calculated in the limit of a magnetization4πM, small compared with the inductionB, i.e., at low temperature nearly the whole magnetic field region betweenH c2 andH c1. Because the Ginsburg-Landau equations are invalid in this case, we find a magnetic field distribution which has no simple, local relation with the square of the order parameter ‖Δ(r)‖2 as is the case nearT c . We find atT=0 and very near toH c2 that the magnetic field map (see Fig. 2) has two singularities at the maximum fieldH v and minimum fieldH m . These singularities have a conical shape, instead of the parabolic shape found nearT c . We find a finite temperature derivative of these fieldsdH v /dT=−dH m /dT≠0 atT=0 in the limitH=H c2; this result is in agreement with those of Kung.8 We compare our results with the intensity of Bragg lines of neutron diffraction found by Cribier, Simon, and Thorel. The amplitude of variation of the magnetic field is 5.3 times the magnetization atT=0 nearH c2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00628307
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