Complex magnetic susceptibility derived from the bean model for isotropical rectangular geometryстатья
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Аннотация:A magnetic field harmonically varying in time (to probe the sample) and the lock-in technique (to register the sample response sensed by a pick-up coil) are widely used to characterize superconductors. Measuring the temperature dependence of the complex ac susceptibility is the most common procedure of this type. Resistivity, critical temperatures and fields, granularity, critical current density J(c), and the content of the superconducting phase can be derived from ac susceptibility data [1].