The experimental magnetic-field derivative of the microwave absorption signal, obtained using electron paramagnetic resonance techniques, has a line shape that depends on the Ginzburg-Landau model parameter κ of the superconducting sample at a given temperature. The type-II superconducting equation of state can be utilized to describe the drop in the output microwave power derivative, from its maximum at H ≃Hc1 to its much lower values when H ≫Hc1, in order to estimate the values of κ. The technique also allows for the experimental determination of hysteretic behavior in B as a function of H.


Originally published in Journal of Applied Physics 69, 4143 (1991). DOI:10.1063/1.348432 (http://dx.doi.org/10.1063/1.348432).


Ginzburg-Landau model, magnetic field derivative, kappa, high Tc, microwave absorption signal, hysteretic behavior

Subject Categories

Superconductors, Magnetic fields, Electron paramagnetic resonance


Electromagnetics and photonics


American Institute of Physics

Publication Date


Rights Information

Copyright 1991 American Institute of Physics.

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American Institute of Physics

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