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In this work, an experimental approach toward reaching new insights into the mechanism of superconductivity in the iron-based compounds is presented. The temperature dependence of the penetration depth and of the microwave conductivity of high-quality Ba(Fe1-xCox)2As2 and (Ba1-xKx)Fe2As2 single crystals have been obtained by a 7.97-GHz superconducting coplanar resonator technique, in a perturbative...
Concept of equivalent temperature is proposed for precise temperature measurement of crystals and glasses in laser calorimetry and nonlinear optics experiments. Determination of equivalent temperature of laser irradiated crystal or glass is based on frequency shift measurement of temperature calibrated acoustic resonance, excited in the sample.
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