ac magnetic response of mesoscopic type-II superconductors

Article

关键词: LONDON PENETRATION DEPTH;    GINZBURG-LANDAU EQUATION;    NUMERICAL-SIMULATION;    SURFACE IMPEDANCE;    FIELD DEPENDENCE;    VORTEX DYNAMICS;    STATE;    PERMEABILITY;    VORTICES;    NUCLEATION;   

DOI  :  10.1103/PhysRevB.66.144505

来源: SCIE

【 摘 要 】

The response of mesoscopic superconductors to an ac magnetic field is numerically investigated on the basis of the time-dependent Ginzburg-Landau equations. We study the dependence with frequency omega and dc magnetic field H-dc of the linear ac susceptibility chi(H-dc,omega) in square samples with dimensions of the order of the London penetration depth. At H-dc=0 the behavior of chi as a function of omega agrees very well with the two-fluid model, and the imaginary part of the ac susceptibility, chi(')(omega), shows a dissipative maximum at the frequency nu(o)=c(2)/(4pisigmalambda(2)). In the presence of a magnetic field a second dissipation maximum appears at a frequency omega(p)

【 授权许可】

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