Abstract
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.
Keywords
Ginzburg-Landau model, magnetic field derivative, kappa, high Tc, microwave absorption signal, hysteretic behavior
Subject Categories
Superconductors, Magnetic fields, Electron paramagnetic resonance
Disciplines
Electromagnetics and photonics
Publisher
American Institute of Physics
Publication Date
4-1-1991
Rights Information
Copyright 1991 American Institute of Physics.
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Karim, R.; How, H.; Vittoria, C.; and Widom, A., "Measurement of kappa in high Tc superconductors" (1991). Electrical and Computer Engineering Faculty Publications. Paper 80. http://hdl.handle.net/2047/d20002251
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Notes
Originally published in Journal of Applied Physics 69, 4143 (1991). DOI:10.1063/1.348432 (http://dx.doi.org/10.1063/1.348432).