Abstract
Results of field and temperature dependencies investigation of ac-magnetic susceptibility χ ac for ceramic sample HgBa 2Ca 2Cu 3O 8+δ are shown. Measuring have been done using inductive Hartshorne bridge with the previous writing of output signal by computer. Such an approach allows to simplify distinguishing process of χ′ and χ″ components and simultaniously to receive information about the behaviour of several harmonics of ac-magnetic susceptibility. Theoretical temperature dependencies of ac-magnetic susceptibility have been calculated using the modefied critical state model with consideration of granules distribution by sizes.
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