Abstract
It is shown that the measurement of the properties of the low-magnetic field microwave absorption using an EPR spectrometer needs to be corrected for instrumental effects, which can be accomplished by using a low-field calibration resonance from Cr3+ in ruby. The results show the existence of a hysteresis in intensity and field position, but the latter is somewhat smaller than previously reported. The temperature dependence of the intensity of the absorption is accounted for in terms of the temperature dependence of the current in a Josephson junction assuming a mean field temperature dependence for the superconducting gap.
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Owens, F.J. Properties of the microwave absorption in high-temperature superconductor Y-Ba-Cu-O. J Supercond 2, 409–417 (1989). https://doi.org/10.1007/BF00618527
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DOI: https://doi.org/10.1007/BF00618527