Fluxon dynamics in Li–Al codoped by microwave surface resistance measurements
نویسندگان
چکیده
منابع مشابه
Fluxon dynamics in Li-Al codoped MgB2 by microwave surface resistance measurements
The magnetic-field-induced variations of the microwave surface resistance, Rs, have been investigated in ceramic Mg1−x(LiAl)xB2, with x in the range 0.1 ÷ 0.4. The measurements have been performed on increasing and decreasing the DC magnetic field, H0, at fixed temperatures. At low temperatures, we have observed a magnetic hysteresis in the Rs(H0) curves in all the investigated samples. On incr...
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Field-induced variations of the microwave surface resistance, Rs(H), have been investigated in high-density ceramic MgB2. At low temperatures, several peculiarities of the Rs(H) curves cannot be justified in the framework of models reported in the literature. We suggest that they are ascribable to the unconventional vortex structure in MgB2, related to the presence of two gaps. On the contrary,...
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Microwave Residual Surface Resistance of Superconductors”
Two distinct models account for the microwave residual surface resistance of superconducting cavities with equally good agreement with the measured temperature and frequency dependence. In presenting his phonon generation model, Passow claimed that Rabinowitz’s fluxoid power loss model of residual resistance does not fit the experimental data, whereas his does. In fact, the two models have esse...
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ژورنال
عنوان ژورنال: Physica C: Superconductivity
سال: 2010
ISSN: 0921-4534
DOI: 10.1016/j.physc.2010.02.029